Add optional local colored lights for beta.139

Verify Sanctuary shaders on Vulkan with explicit backend tests
Record beta.138 release and preserved Prism state
2026-09-18 02:25:48 +02:00 · 2026-09-18 01:59:13 +02:00 · 2026-09-18 01:25:31 +02:00 · 2026-09-18 01:24:13 +02:00 · 2026-09-18 01:01:59 +02:00
30 changed files with 917 additions and 41 deletions
@@ -20,11 +20,11 @@ La [vision complète](docs/vision.md) conserve les intentions ; le
 L’économie, les claims et les dimensions décrits dans la vision restent
 à implémenter.

-La version **beta.137** ajoute des **rayons solaires volumétriques** qui traversent
-les ouvertures du décor et le feuillage. Activés à 35 %, réglables indépendamment
-du bloom dans **Options → Shaders**. Carte d'ombres partagée, portée de 64 blocs
-maximum. Le [ticket](docs/shader-beta137.md) détaille les vérifications.
-Livraison en cours de vérification.
+La version **beta.139** ajoute les **lumières colorées** optionnelles : les vrais
+blocs lumineux teintent les surfaces voisines, même quand la source est hors
+champ. Intensité indépendante, réglée à 35 % ; obstacles natifs et cache local.
+Le [ticket](docs/colored-lights-beta139.md) décrit les limites et vérifications.
+La [vérification Vulkan antérieure](docs/shader-vulkan-beta138.md) reste disponible.
 La [livraison précédente](docs/clay-workshop-integration-beta110.md) réunit déjà
 l’atelier, les œufs et la neige saisonnière dans l’instance **Sanctuary Beta**.
 Les [synchronisations antérieures](docs/git-sync-beta092.md) restent documentées.
@@ -35,6 +35,21 @@ La [carte native beta.005](docs/atlas-beta005.md) prend le relais après
 l’étude de Xaero et des alternatives libres.


+## beta.139 — Lumières colorées
+
+Teintes chaudes, sources des âmes bleues, redstone rouge, froglights et matériaux lumineux.
+Option désactivée initialement, intensité 35 % ; propagation locale avec obstacles.
+[Contrat et vérifications](docs/colored-lights-beta139.md) ·
+[Pack normal](https://git.botsu.net/koka/sanctuary-beta/releases/download/beta.139/Sanctuary-beta.139.mrpack) ·
+[Pack de test](https://git.botsu.net/koka/sanctuary-beta/releases/download/beta.139/Sanctuary-Test-beta.139.mrpack).
+
+## beta.138 — Rayons et brouillard
+
+Densité automatique des rayons selon le brouillard et les précipitations.
+[Contrat et vérifications](docs/shader-beta138.md) ·
+[Pack normal](https://git.botsu.net/koka/sanctuary-beta/releases/download/beta.138/Sanctuary-beta.138.mrpack) ·
+[Pack de test](https://git.botsu.net/koka/sanctuary-beta/releases/download/beta.138/Sanctuary-Test-beta.138.mrpack).
+
 ## beta.137 — Rayons solaires

 Faisceaux volumétriques légers, intensité réglable et feuillage perméable.
@@ -0,0 +1,95 @@
+# LIGHT-139 — Lumières colorées
+
+Socle beta.138 + vérification Vulkan `9d84a02`, Minecraft 26.3 / Java 25.
+Branche `codex/colored-lights-beta139`, livraison beta.139.
+
+## Contrat
+
+Option locale « Lumières colorées » avec intensité. Les vrais blocs émetteurs
+teintent discrètement leurs environs, y compris hors champ. Torches/lanternes,
+lave et feu chauds ; sources des âmes bleues ; redstone active rouge ;
+froglights par variante ; sources Sanctuary selon leur texture/matière.
+Les blocs éteints n'émettent pas. Le bloom et les inclusions émissives des
+minerais restent indépendants ; aucune lumière de gameplay n'est ajoutée.
+
+Propagation RGB dans un volume local de blocs chargés, obstacles et formes
+natives, construction répartie entre les images, cache des couleurs de
+matériaux. Aucun chargement forcé de chunk, accès aux mondes personnels,
+changement de sauvegarde, réseau ou règles serveur.
+
+## Réalisation
+
+Dans les options du shader : « Lumières colorées », désactivées initialement,
+et une intensité de 0 à 100 %, réglée à 35 %. Zéro ou OFF libère les ressources.
+Les préférences existantes sont conservées. Libellés et aides FR/EN.
+
+Les familles vanilla demandées ont une palette dédiée. Les autres émetteurs,
+y compris ceux de Sanctuary, utilisent la couleur des pixels lumineux de leurs
+textures de modèle, calculée puis mise en cache. Ce repli suit les packs de
+ressources ; les palettes dédiées vanilla restent constantes. Une texture
+illisible ou sans pixels exploitables utilise du blanc. Les blocs purement
+émissifs du bloom, sans émission lumineuse native, ne deviennent pas des lampes.
+
+Le champ couvre un cube de 64 blocs de côté autour de la caméra. Une marge de
+14 blocs réserve la propagation aux sources présentes dans le volume ; le rendu
+s'atténue progressivement sur 4 blocs à sa périphérie. C'est donc un effet de
+proximité, pas une illumination de tous les chunks visibles. Les formes et
+l'opacité natives règlent le passage de la lumière. Les canaux utilisent des
+maxima indépendants, sans addition illimitée des sources superposées.
+
+Le calcul CPU est réparti avec un budget visé de 2 ms par image, plus les
+allocations et chargements ponctuels de matériaux ; aucun chiffre de FPS n'est
+garanti. Un monde immobile réutilise son champ. Les changements rapides et les
+déplacements peuvent présenter un bref retard, le temps de publier un champ
+complet. Aucun chargement forcé de chunk. Une texture 512 × 512 contient le champ.
+La passe GPU teinte les surfaces visibles, atténue l'effet au soleil et dans le
+brouillard, puis laisse agir le SSGI et le bloom. Les sources tenues, entités,
+particules et le rendu sous l'eau/lave ne sont pas couverts par cette option.
+
+## Vérifications
+
+Essais client natifs réussis dans des mondes neufs (graine 122) sur Apple M1 :
+
+- OpenGL 4.1 Metal : **1 min 46 s**, `build/colored139-opengl.log`.
+- Vulkan / MoltenVK 1.4.2, profondeur 0–1 et transparence améliorée :
+  **1 min 30 s**, `build/colored139-vulkan.log`.
+
+Les deux journaux contiennent `COLORED139_PASS` et le backend réellement actif.
+Torche et torche des âmes hors champ, trois froglights, pierre lumineuse dont
+la couleur vient de sa texture, intensité 35/100, cache statique, déplacement
+et retour de caméra, mur fermé puis ouvert, lampe redstone allumée puis éteinte,
+retrait de source, rechargement des ressources et OFF/zéro vérifiés.
+Les préférences persistantes et les libellés FR/EN sont contrôlés ; une dernière
+capture active conjointement PBR, SSGI, bloom, ombres, highlights et rayons.
+
+Les sommes d'écart entre OFF et 35 % sont presque identiques entre backends :
+torche 2 025 577 / 2 025 576 ; âmes 964 200 / 964 201. Il s'agit de mesures
+sur les pixels de cette scène, pas d'un indice de performance.
+Comparatif autonome : `build/Shader-beta.139-comparaison.html`.
+Pas de validation du pilote Vulkan Windows de l'utilisateur revendiquée.
+Le test fige uniquement le scintillement vanilla des torches afin de comparer
+les images ; cette sonde est exclue du JAR distribué. Aucun monde personnel ouvert.
+
+## Diagnostic des essais
+
+La première comparaison de stabilité détectait le scintillement natif de la
+lightmap des torches, même avec un champ coloré inchangé. La sonde de test
+stabilise ce seul facteur ; aucune désactivation de scintillement en production.
+La pièce d'essai est désormais construite après le chargement de ses chunks,
+et l'absence de lumière du ciel est vérifiée avant les captures.
+
+## Construction et archives
+
+`./gradlew check build assemblePack assembleTestPack -x :sanctuary:runGameTest`
+réussit en **2 min 22 s**, 126 tâches. Le serveur GameTest dédié reste exclu
+conformément au refus EULA antérieur. Log : `build/shader139-build.log`.
+La comparaison à beta.138 trouve **13 entrées de production** modifiées,
+limitées au shader, à son menu et aux aides FR/EN. Les sondes de test sont
+absentes du JAR distribué. Sources, archives normale/Test et template complets
+vérifiés ; textures des gemmes et clé de Steve conservées à l'identique.
+Reçu local : `build/shader139-artifact.json`.
+
+JAR SHA-256 : `7b958f6576adbabb2b1af589b866cb52b1a65600ea2fa505b05dd283f8d595df`.
+
+- `Sanctuary-beta.139.mrpack` : 10450317 octets ; SHA-256 `13f3a283c260876d28ce0c6504615b4a8f4d575906badfbb2b39558f312e9fbb`.
+- `Sanctuary-Test-beta.139.mrpack` : 10469244 octets ; SHA-256 `c1e0b684dc2650950a0925c4625ef5eb4b78fb5f1c5680f5e302550424fa6d81`.
@@ -14,6 +14,30 @@ JAR Sanctuary sont des pièces jointes de releases Gitea. Aucun JAR de mod ou
 dépendance téléchargée n'entre dans l'historique Git. Le canal Beta est distinct
 de l'ancien pack 26.2.

+## beta.138 — Densité des rayons selon la météo
+
+Brouillard plus dense et diffus, précipitations et atténuation de l'orage.
+Réglage manuel conservé, aucune nouvelle option ni modification de sauvegarde.
+[Contrat et vérifications](shader-beta138.md).
+[Release beta.138](https://git.botsu.net/koka/sanctuary-beta/releases/tag/beta.138)
+publiée ; canal `c049423de1971079b9d61874d83adeb6f1ad49f7`. Deux synchronisations isolées,
+puis deux dans la même instance Sanctuary Beta réussies. Les 923 fichiers
+personnels suivis gardent leurs hashes. Aucun monde personnel ouvert ;
+sauvegarde préalable `sanctuary-backups/before-beta.138/`.
+Packs normal/Test/template vérifiés dans `sanctuary-beta/build/`.
+
+## beta.137 — Rayons solaires volumétriques
+
+Rayons à travers les ouvertures et le feuillage, activés à 35 %, indépendants
+du bloom et de l'affichage des ombres de surface. Carte solaire partagée.
+[Contrat et vérifications](shader-beta137.md).
+[Release beta.137](https://git.botsu.net/koka/sanctuary-beta/releases/tag/beta.137)
+publiée ; canal `68cb39a5edbf5d34def02f670e2488ee852605b8`. Deux synchronisations isolées,
+puis deux dans la même instance Sanctuary Beta réussies. Les 923 fichiers
+personnels suivis gardent leurs hashes. Aucun monde personnel ouvert ;
+sauvegarde préalable `sanctuary-backups/before-beta.137/`.
+Packs normal/Test/template vérifiés dans `sanctuary-beta/build/`.
+
 ## beta.136 — Lens flare rectangulaire

 Rectangles à dégradé doux pour le soleil et la lune, activés à 30 % et
@@ -79,3 +79,18 @@ Reçu local : `build/shader137-artifact.json`.
 - `Sanctuary-Test-beta.137.mrpack` : 10450650 octets ; SHA-256 `32b0cee60152b6a5c8f31b248391c79a5fdf47b649de74902b066457ad4785ef`.

 JAR : `f1fbc106b4b048753f9a669af37e9c12f92168af486d4072f514e86920c81faa`.
+
+## Livraison
+
+[Release beta.137](https://git.botsu.net/koka/sanctuary-beta/releases/tag/beta.137)
+publiée depuis `2d7072b8a8febac53354e9d0063246ac1e843e37`. Canal packwiz
+`68cb39a5edbf5d34def02f670e2488ee852605b8` ; téléchargements publics vérifiés par SHA-256.
+Deux synchronisations isolées puis deux dans la même instance **Sanctuary Beta**
+réussissent. Un seul JAR beta.137 actif ; les **923 fichiers personnels suivis**,
+dont sauvegardes et préférences, gardent leurs hashes. Copie préalable dans
+`sanctuary-backups/before-beta.137/`, aucun monde personnel ouvert.
+
+Packs normal/Test/template et comparatif natif également vérifiés dans
+`sanctuary-beta/build/`. Le checkout original garde ses changements préexistants.
+Reçus locaux ignorés : `build/shader137-artifact.json`, `build/shader137-isolated.json`,
+`build/shader137-prism.json`, `build/shader137-publication.log`.
@@ -0,0 +1,101 @@
+# SHADER-138 — Épaisseur des rayons et météo
+
+Demande : épaissir les sunshafts avec la météo, surtout le brouillard.
+Socle beta.137, branche `codex/sunshaft-weather-beta138`, Minecraft 26.3 / Java 25.
+Aucune modification des règles météo, des sauvegardes ou du gameplay.
+
+## Contrat
+
+Densité et diffusion liées au brouillard environnemental réellement rendu,
+indépendamment de la limite de distance de rendu. Pluie/neige natives :
+renforcement plus modéré ; orage : réduction supplémentaire du soleil.
+Transitions continues, mêmes deux passes et seize segments. Le réglage
+manuel conserve sa valeur, aucune nouvelle option.
+
+## Rendu
+
+Le brouillard utilise `FogData.environmentalEnd`, séparé de la distance de
+rendu native. Sa contribution croît en douceur entre 192 et 80 blocs de
+visibilité. La densité passe de ×1 à ×3,5 pour le brouillard seul ; la diffusion
+angulaire s'élargit et la lumière lointaine s'éteint plus vite. Les coefficients
+ne dépendent d'aucun bruit animé ni historique d'image.
+
+Pluie et neige utilisent le niveau natif de précipitation : densité jusqu'à
+×1,8, diffusion plus légère. La lumière disponible tombe progressivement à
+25 % sous une pluie maximale et à 8,75 % sous un orage maximal. La carte solaire
+reste disponible pour le volume même lorsque Minecraft cache entièrement
+son disque solaire ; les ombres sur les surfaces conservent leur comportement.
+Le brouillard et la météo continuent leurs transitions natives.
+
+Même cible au quart de chaque dimension, deux passes, seize segments et
+quatre lectures de la carte par segment. L'empreinte de l'ombre ne change pas :
+la météo ne crée pas d'ouverture artificielle à travers un mur.
+
+## Vérification
+
+Scénario client natif réussi en **3 min 29 s**, macOS / Apple M1 / OpenGL.
+Les contrôles des volumes beta.137 passent à nouveau : ouvertures, feuilles,
+pièce fermée, mouvement/retour, proximité, soleil hors champ, intensité,
+OFF/zéro/nuit, redimensionnement, rechargement, préférences et libellés FR/EN.
+
+La suite utilise ensuite les vraies commandes serveur de météo : clair,
+`weather fog`, pluie, orage et retour au clair, dans le même décor avec le
+curseur maintenu à 35. Transition progressive du brouillard, rechargement
+sous brouillard, absence d'éclairage d'une pièce fermée et restitution de
+l'image claire initiale vérifiés. La contribution normalisée du volume dans
+cette scène passe d'environ 0,0034 au clair à 0,0236 sous brouillard ; ce n'est
+pas un multiplicateur universel de luminosité. L'orage reste sous la pluie.
+
+Log : `build/shader138-client-final.log`, marqueurs `SUNSHAFT137_PASS` et
+`SUNSHAFT138_WEATHER_PASS`. Comparatif natif autonome :
+`build/Shader-beta.138-comparaison.html`.
+
+## Diagnostic de la pluie
+
+La première exécution native a validé le brouillard, puis s'est arrêtée en
+attendant des rayons sous une pluie maximale. Minecraft 26.3 fournit alors
+`rainBrightness = 1 - rainLevel`, soit zéro : beta.137 ne construisait plus la
+carte solaire. Le volume reçoit désormais son atténuation météo propre et
+conserve la carte nécessaire, sans réactiver les ombres de surface sous la
+pluie maximale. Log de diagnostic : `build/shader138-client-first.log`.
+
+## Limites
+
+Coefficients artistiques bornés, sans simulation physique de gouttes ni de
+nuages. Le brouillard environnemental est distinct de la simple distance
+d'affichage ; la pluie et la neige partagent le niveau natif de précipitation.
+Les limites des volumes beta.137 restent applicables : 64 blocs maximum,
+formes de la carte d'ombres et feuillage approximé. Pas de mesure de FPS ni
+de validation Windows/Vulkan revendiquée.
+
+
+## Construction et archives
+
+`./gradlew check build assemblePack assembleTestPack -x :sanctuary:runGameTest`
+réussit en **2 min 20 s**, 126 tâches. Le serveur GameTest dédié reste exclu
+conformément au refus EULA antérieur. Log : `build/shader138-build.log`.
+Comparaison à beta.137 : **6 entrées de production** modifiées, uniquement
+le rendu et les aides FR/EN. Gameplay et textures des gemmes strictement
+conservés. JAR normal/Test identique, sources et template vérifiés.
+Reçu local : `build/shader138-artifact.json`.
+
+- `Sanctuary-beta.138.mrpack` : 10432860 octets ; SHA-256 `67093d3a53e3d90c31e8fb940d709ccf41ad730595e358346fa27ad744b44460`.
+
+- `Sanctuary-Test-beta.138.mrpack` : 10451787 octets ; SHA-256 `1ff39158b47f44a831b6506c8c2636441b2bff02644d20b1698330097e5ff059`.
+
+JAR : `44b6dd14f0e962fcb6f1efd61e0e7bb2c8dbb033cef81598582ec16c46a46518`.
+
+## Livraison
+
+[Release beta.138](https://git.botsu.net/koka/sanctuary-beta/releases/tag/beta.138)
+publiée depuis `daf36fdeacca707930092363589c89984af78f3b`. Canal packwiz
+`c049423de1971079b9d61874d83adeb6f1ad49f7` ; téléchargements publics vérifiés par SHA-256.
+Deux synchronisations isolées puis deux dans la même instance **Sanctuary Beta**
+réussissent. Un seul JAR beta.138 actif ; les **923 fichiers personnels suivis**,
+dont sauvegardes et préférences, gardent leurs hashes. Copie préalable dans
+`sanctuary-backups/before-beta.138/`, aucun monde personnel ouvert.
+
+Packs normal/Test/template et comparatif natif également vérifiés dans
+`sanctuary-beta/build/`. Le checkout original garde ses changements préexistants.
+Reçus locaux ignorés : `build/shader138-artifact.json`, `build/shader138-isolated.json`,
+`build/shader138-prism.json`, `build/shader138-publication.log`.
@@ -0,0 +1,99 @@
+# SHADER-139 — Compatibilité Vulkan du shader beta.138
+
+Socle **beta.138**, Minecraft **26.3**, Java **25**, branche
+`codex/vulkan-shaders-beta139`.
+
+Le signalement initial concernait un bloom invisible même à 100 %. Le joueur
+indique ensuite que le rendu fonctionne de nouveau sur Windows et demande
+la compatibilité Vulkan. Les changements expérimentaux d'intensité ont été
+retirés : les shaders et les valeurs par défaut restent ceux de beta.138.
+
+## Contrat
+
+Utiliser les mêmes pipelines RenderPearl sur OpenGL et Vulkan. Vérifier le
+backend réellement utilisé, car Minecraft peut retomber sur OpenGL lorsque
+Vulkan ne démarre pas. Tester les effets dans de nouveaux mondes ignorés,
+sans ouvrir de sauvegarde personnelle ni modifier le backend de l'instance Prism.
+
+Le lancement des tests accepte désormais `-PsanctuaryClientGraphicsBackend=vulkan`
+ou `opengl`. Les tests de shaders refusent tout repli silencieux et consignent
+le nom du backend, du GPU et du pilote. Cette option concerne uniquement
+le client de développement.
+
+## Reproduction
+
+```sh
+JAVA_HOME=/chemin/vers/jdk-25 ./gradlew :sanctuary:runClientGameTest \
+  -PsanctuaryClientTests=true -PsanctuaryPixelShadows122ClientTests=true \
+  -PsanctuaryClientGraphicsBackend=vulkan \
+  -PsanctuaryClientNoVsync=true -PsanctuaryQuickTests=true
+```
+
+Sur Windows, utiliser `gradlew.bat` avec les mêmes propriétés et Java 25.
+Ajouter `-PsanctuaryClientImprovedTransparency=true` pour tester la transparence
+améliorée ; le choix initial est restauré après le test.
+Pour les rayons et la météo, remplacer `sanctuaryPixelShadows122ClientTests`
+par `sanctuarySunshaft137ClientTests`. Pour isoler le bloom et le lens flare,
+utiliser `sanctuaryBloom130ClientTests`.
+
+## Diagnostic initial
+
+Le client Vulkan démarre ici sur **Apple M1 / MoltenVK 1.4.2**, API 1.2.350.
+Le test du bloom réussit en **2 min 19 s** : les masques des vingt minerais,
+les contrôles OFF/zéro, intensité/diffusion, l'occlusion, le rechargement,
+les torches, glowstone, lampes, lave, soleil et le lens flare sont vérifiés.
+Les mesures de référence du bloom sont identiques à celles d'OpenGL :
+14649 pixels de minerai, gain du halo faible 218131, fort 1970502,
+gain solaire 7708. Log : `build/shader139-vulkan-first.log`.
+
+Cela confirme cette combinaison précise ; ce n'est pas une validation des
+pilotes NVIDIA/AMD/Intel sous Windows. En cas de retour du problème, le
+`logs/latest.log` de la session Windows concernée est nécessaire pour relever
+le backend effectif, le GPU, le pilote et les éventuelles erreurs de pipeline.
+
+## Suite Vulkan
+
+`sanctuaryPixelShadows122ClientTests` réussit en **8 min 50 s**. Les contrôles
+couvrent ombres diurnes/nocturnes, feuillage, stabilité en temps réel,
+highlights CTM, bloom et lens flare, SSGI en déplacement et près des surfaces,
+PBR directionnel, rechargement, redimensionnement et interfaces FR/EN.
+Log : `build/shader139-vulkan-suite2.log`.
+
+Le bloom et le lens flare réussissent aussi avec
+`sanctuaryClientImprovedTransparency=true`, en **1 min 45 s**. Le backend
+est bien Vulkan, sa profondeur est en `[0, 1]` et l'option de transparence
+est active. Les mesures du bloom restent identiques.
+Log : `build/shader139-vulkan-transparency.log`.
+
+La suite météo/rayons beta.138 n'a pas été rejouée sous Vulkan dans ce ticket ;
+les résultats ci-dessus portent sur les effets explicitement listés.
+Le joueur confirme que le retour à OpenGL rétablit l'effet sur Windows.
+Ce défaut particulier reste à reproduire à partir d'un journal récent.
+
+Un premier lancement utilisait un nom de propriété incomplet et a exécuté
+la suite générale, échouant dans Blocodex avant les tests de shaders.
+Ce lancement n'est pas compté comme une validation Vulkan des shaders.
+La commande corrigée utilise `sanctuaryPixelShadows122ClientTests`.
+
+## Construction
+
+`./gradlew check build -x :sanctuary:runGameTest` réussit ; le serveur
+GameTest dédié reste exclu conformément au refus EULA antérieur.
+Log : `build/shader139-check-build.log`. Le JAR reconstruit est **strictement
+identique, octet pour octet**, au JAR Sanctuary de la release beta.138.
+La distribution ne change pas et ne nécessite donc pas de nouvel assemblage.
+
+## Distribution
+
+Ce ticket ajoute des options de lancement de tests et leur documentation.
+Les shaders de production et les réglages de beta.138 ne sont pas changés.
+Aucune nouvelle livraison binaire, aucun tag beta.139 ni mise à jour de
+l'instance personnelle n'est effectué pour une vérification seule.
+
+## Référence du moteur
+
+Minecraft 26.3 compile les shaders OpenGL et Vulkan via ShaderC et expose
+`RENDERPEARL_DEPTH_IS_ZERO_TO_ONE` pour la convention de profondeur.
+[Notes officielles Minecraft 26.3](https://feedback.minecraft.net/hc/en-us/articles/48913133328013-Minecraft-Java-Edition-26-3).
+Les effets Sanctuary transmettent déjà la convention du périphérique aux
+reconstructions de position ; aucun remplacement spéculatif n'est appliqué.
@@ -9,8 +9,8 @@ loom_version=1.17.20
 fabric_api_version=0.160.5+26.3

 # Release counter: beta.001, .002, .003, ... (see docs/versioning.md).
-mod_version=beta.137
-pack_version=beta.137
+mod_version=beta.139
+pack_version=beta.139
 resource_pack_version=beta.121
 maven_group=fr.koka.sanctuary
 jei_version=30.32.0-sanctuary.3
@@ -25,6 +25,15 @@ if (clientRenderTests) {
        java.srcDir('src/clientGametest/java')
    }
    tasks.named('runClientGameTest') {
+        def graphicsBackend = providers.gradleProperty('sanctuaryClientGraphicsBackend')
+        if (graphicsBackend.isPresent()) {
+            args('--graphicsBackend', graphicsBackend.get())
+            systemProperty('sanctuary.test.graphicsBackend', graphicsBackend.get())
+        }
+        def improvedTransparency = providers.gradleProperty('sanctuaryClientImprovedTransparency')
+        if (improvedTransparency.isPresent()) {
+            systemProperty('sanctuary.test.improvedTransparency', improvedTransparency.get())
+        }
        systemProperty('sanctuary.test.noVsync', providers.gradleProperty('sanctuaryClientNoVsync').getOrElse('false'))
        systemProperty('sanctuary.test.quick', providers.gradleProperty('sanctuaryQuickTests').getOrElse('false'))
        systemProperty('sanctuary.test.introVisualOnly', providers.gradleProperty('sanctuaryIntroVisualOnly').getOrElse('false'))
@@ -93,6 +102,10 @@ tasks.named('runGameTest') {
 }

 tasks.named('processGametestResources') {
+    def colored139Client = providers.gradleProperty('sanctuaryColored139ClientTests').map { it.toBoolean() }.getOrElse(false)
+    inputs.property('sanctuaryColored139ClientTests', colored139Client)
+    if (colored139Client) filter { line -> line.replace('fr.koka.sanctuary.gametest.SanctuaryClientRenderTests', 'fr.koka.sanctuary.client.shader.ColoredLights139ClientChecks') }
+
    def pbr134Client = providers.gradleProperty('sanctuaryPbr134ClientTests').map { it.toBoolean() }.getOrElse(false)
    inputs.property('sanctuaryPbr134ClientTests', pbr134Client)
    if (pbr134Client) filter { line -> line.replace('fr.koka.sanctuary.gametest.SanctuaryClientRenderTests', 'fr.koka.sanctuary.client.shader.Pbr134ClientChecks') }
@@ -0,0 +1,80 @@
+package fr.koka.sanctuary.client.shader;
+
+import static fr.koka.sanctuary.client.shader.PixelShadows122ClientChecks.*;
+import java.nio.file.Files;
+import net.fabricmc.fabric.api.client.gametest.v1.FabricClientGameTest;
+import net.fabricmc.fabric.api.client.gametest.v1.context.ClientGameTestContext;
+import net.fabricmc.fabric.api.client.gametest.v1.context.TestServerContext;
+import net.fabricmc.loader.api.FabricLoader;
+import net.minecraft.core.BlockPos;
+import net.minecraft.world.level.block.Blocks;
+import net.minecraft.world.level.block.Block;
+import net.minecraft.network.chat.Component;
+
+/** Fresh native world: offscreen sources, true voxel occlusion and real GPU tint. */
+public final class ColoredLights139ClientChecks implements FabricClientGameTest {
+    private static final BlockPos SOURCE=new BlockPos(98,101,102),PROBE=new BlockPos(99,101,106);
+    public void runTest(ClientGameTestContext c){
+        System.setProperty("sanctuary.test.freezeBlockFlicker","true");
+        try{new PixelShadows122ClientChecks(false,false,false,false,false,true).runTest(c);}
+        finally{System.clearProperty("sanctuary.test.freezeBlockFlicker");}
+    }
+    static void run(ClientGameTestContext c,TestServerContext server){
+        c.runOnClient(m->{preferences();m.options.particles().set(net.minecraft.server.level.ParticleStatus.MINIMAL);VanillaLight.setEnabled(true);VanillaLight.setSaturation(100);VanillaLight.setPbr(false);VanillaLight.setSsgi(false);VanillaLight.setBloom(false);VanillaLight.setOreEmission(false);VanillaLight.setLensFlare(false);VanillaLight.setEdgeHighlights(false);VanillaLight.setPixelShadows(false);VanillaLight.setSunshafts(false);VanillaLight.setColoredLights(false);VanillaLight.setColoredLightIntensity(35);});
+        camera(c,server,100.5,101,104.5,70);c.waitTicks(30);
+        server.runOnServer(s->{command(s,"time set 18000");
+            for(int x=88;x<=112;x++)for(int z=92;z<=116;z++)for(int y=100;y<=109;y++)
+                s.overworld().setBlockAndUpdate(new BlockPos(x,y,z),(y==100||y==109||x==88||x==112||z==92||z==116)?Blocks.CONCRETE.white().defaultBlockState():Blocks.AIR.defaultBlockState());
+        });
+        look(c,server,0,35);c.waitTicks(30);
+        c.waitFor(m->m.level.getBrightness(net.minecraft.world.level.LightLayer.SKY,PROBE)==0,1200);
+        long warm=0;
+        for(var block:new Block[]{Blocks.TORCH,Blocks.SOUL_TORCH,Blocks.PEARLESCENT_FROGLIGHT,Blocks.VERDANT_FROGLIGHT,Blocks.OCHRE_FROGLIGHT,Blocks.GLOWSTONE}){
+            source(c,server,block);enable(c,false);var off=capture(c,"colored-"+name(block)+"-off");enable(c,true);var on=capture(c,"colored-"+name(block)+"-35");
+            int color=c.computeOnClient(m->ColoredLights.sample(PROBE));long delta=difference(off,on);
+            check(delta>250,"Offscreen source visibly tints native surfaces: "+name(block)+" "+delta);
+            int r=color>>16&255,g=color>>8&255,b=color&255;
+            if(block==Blocks.TORCH){check(r>g&&g>b,"Torch is warm");warm=delta;}
+            if(block==Blocks.SOUL_TORCH)check(b>g&&g>r,"Soul source is blue");
+            if(block==Blocks.VERDANT_FROGLIGHT)check(g>r&&g>b,"Verdant froglight is green");
+            if(block==Blocks.PEARLESCENT_FROGLIGHT)check(r>g&&b>g,"Pearlescent froglight is pink");
+            if(block==Blocks.OCHRE_FROGLIGHT)check(r>g&&g>b,"Ochre froglight is warm");
+            if(block==Blocks.GLOWSTONE)check(r>b,"Other emitters derive their colour from the native texture");
+            System.out.println("COLORED139_SOURCE "+name(block)+" sample="+Integer.toHexString(color)+" delta="+delta);
+        }
+        source(c,server,Blocks.TORCH);enable(c,false);var base=capture(c,null);enable(c,true);var low=capture(c,null);
+        c.runOnClient(m->VanillaLight.setColoredLightIntensity(100));settle(c);var strong=capture(c,"colored-torch-100");check(difference(base,strong)>difference(base,low)*1.5,"Intensity increases colour, without changing native light");
+        int builds=c.computeOnClient(m->ColoredLights.builds());c.waitTicks(25);check(c.computeOnClient(m->ColoredLights.builds())==builds,"Stationary volume is cached");unchanged(strong,capture(c,null),"Static light is stable");
+        camera(c,server,104.5,101,104.5,70);look(c,server,0,35);settle(c);capture(c,"colored-moved");
+        camera(c,server,100.5,101,104.5,70);look(c,server,0,35);settle(c);unchanged(strong,capture(c,"colored-returned"),"Moving and returning preserves world-anchored light");
+        // A complete divider closes the room; light may not take a path around its edges.
+        server.runOnServer(s->{for(int y=101;y<109;y++)for(int z=93;z<116;z++)s.overworld().setBlockAndUpdate(new BlockPos(99,y,z),Blocks.STONE.defaultBlockState());});c.waitTicks(35);settle(c);
+        check((c.computeOnClient(m->ColoredLights.sample(new BlockPos(100,101,106)))&0xffffff)==0,"Opaque wall blocks colour propagation");
+        enable(c,false);var sealedOff=capture(c,null);enable(c,true);unchanged(sealedOff,capture(c,"colored-sealed"),"No coloured light crosses a sealed wall");
+        server.runOnServer(s->{for(int y=101;y<109;y++)for(int z=93;z<116;z++)s.overworld().setBlockAndUpdate(new BlockPos(99,y,z),Blocks.AIR.defaultBlockState());});c.waitTicks(35);settle(c);
+        check((c.computeOnClient(m->ColoredLights.sample(PROBE))&0xffffff)!=0,"Opening the wall restores light");
+        server.runOnServer(s->{s.overworld().setBlockAndUpdate(SOURCE,Blocks.REDSTONE_LAMP.defaultBlockState());s.overworld().setBlockAndUpdate(SOURCE.below(),Blocks.REDSTONE_BLOCK.defaultBlockState());});c.waitTicks(35);settle(c);
+        int red=c.computeOnClient(m->ColoredLights.sample(PROBE));check((red>>16&255)>(red>>8&255)&& (red>>16&255)>(red&255),"Powered redstone source is red");capture(c,"colored-redstone-on");
+        server.runOnServer(s->s.overworld().setBlockAndUpdate(SOURCE.below(),Blocks.CONCRETE.white().defaultBlockState()));c.waitTicks(35);settle(c);
+        check((c.computeOnClient(m->ColoredLights.sample(PROBE))&0xffffff)==0,"Unpowered lamp removes cached coloured light");
+        source(c,server,Blocks.SOUL_TORCH);var beforeReload=capture(c,null);
+        var reload=c.computeOnClient(net.minecraft.client.Minecraft::reloadResourcePacks);c.waitFor(m->reload.isDone()&&m.gui.overlay()==null,1200);reload.join();settle(c);unchanged(beforeReload,capture(c,"colored-reloaded"),"Resource reload rebuilds materials and light field");
+        source(c,server,Blocks.AIR);check((c.computeOnClient(m->ColoredLights.sample(PROBE))&0xffffff)==0,"Removing the source clears its light");
+        source(c,server,Blocks.SOUL_TORCH);enable(c,false);var off=capture(c,null);c.runOnClient(m->{VanillaLight.setColoredLights(true);VanillaLight.setColoredLightIntensity(0);});c.waitTicks(10);
+        c.runOnClient(m->check(!ColoredLights.allocated(),"Zero releases volume and GPU resources"));unchanged(off,capture(c,null),"Zero is identical to OFF");
+        c.runOnClient(m->{for(String locale:new String[]{"fr_fr","en_us"}){m.getLanguageManager().setSelected(locale);m.getLanguageManager().onResourceManagerReload(m.getResourceManager());for(String key:new String[]{"colored_lights","colored_lights_help","colored_light_intensity","colored_light_intensity_help"}){String full="sanctuary.shaders."+key;check(!Component.translatable(full).getString().equals(full),"Translated "+locale+" "+full);}}});
+        c.runOnClient(m->{VanillaLight.setColoredLightIntensity(35);VanillaLight.setPbr(true);VanillaLight.setSsgi(true);VanillaLight.setBloom(true);VanillaLight.setBloomIntensity(20);VanillaLight.setEdgeHighlights(true);VanillaLight.setPixelShadows(true);VanillaLight.setSunshafts(true);VanillaLight.setLensFlare(true);VanillaLight.setOreEmission(true);});
+        settle(c);c.waitFor(m->ProceduralPbr.applied()&&Bloom.applied(),1200);c.waitTicks(30);capture(c,"colored-with-shader-effects");
+        System.out.println("COLORED139_PASS warm="+warm+" offscreen sources, hues, native textured materials, intensity, cache, camera, walls, lamp updates, removal, reload, zero/OFF and FR/EN");
+    }
+    private static String name(Block b){return net.minecraft.core.registries.BuiltInRegistries.BLOCK.getKey(b).getPath();}
+    private static void source(ClientGameTestContext c,TestServerContext s,Block b){s.runOnServer(server->server.overworld().setBlockAndUpdate(SOURCE,b.defaultBlockState()));c.waitTicks(35);if(c.computeOnClient(m->VanillaLight.coloredLights()))settle(c);}
+    private static void enable(ClientGameTestContext c,boolean value){c.runOnClient(m->VanillaLight.setColoredLights(value));if(value)settle(c);else c.waitTicks(8);}
+    private static void settle(ClientGameTestContext c){int before=c.computeOnClient(m->ColoredLights.renderedFrames());c.waitFor(m->ColoredLights.applied()&&ColoredLights.settled()&&ColoredLights.renderedFrames()>before+8,1600);c.waitTicks(8);}
+    private static long difference(Frame a,Frame b){long sum=0;for(int i=0;i<a.pixels().length;i++)sum+=channelDifference(a.pixels()[i],b.pixels()[i]);return sum;}
+    private static void preferences(){try{
+        var path=FabricLoader.getInstance().getConfigDir().resolve("sanctuary-shaders.json");Files.deleteIfExists(path);forgetPreferences();check(!VanillaLight.coloredLights()&&VanillaLight.coloredLightIntensity()==35,"New option is opt-in, subtle at 35 percent");
+        Files.writeString(path,"{\"bloomIntensity\":20,\"ssgi\":false}");forgetPreferences();check(!VanillaLight.coloredLights()&&VanillaLight.coloredLightIntensity()==35&&!VanillaLight.ssgi()&&VanillaLight.bloomIntensity()==20,"Old preferences keep their choices");
+        for(int n:new int[]{-1,0,35,100,400}){VanillaLight.setColoredLights(true);VanillaLight.setColoredLightIntensity(n);forgetPreferences();check(VanillaLight.coloredLights()&&VanillaLight.coloredLightIntensity()==Math.clamp(n,0,100),"Bounded persistent controls");}
+    }catch(java.io.IOException e){throw new AssertionError(e);}}
+}
@@ -36,13 +36,14 @@ import net.minecraft.world.phys.Vec3;

 /** Real terrain/depth-map checks on a new flat seed 122 world; GPU readback is test-only. */
 public final class PixelShadows122ClientChecks implements FabricClientGameTest {
-    private final boolean bloomOnly,ssgiOnly,pbrOnly,closeupOnly,sunshaftOnly;
+    private final boolean bloomOnly,ssgiOnly,pbrOnly,closeupOnly,sunshaftOnly,coloredOnly;
    public PixelShadows122ClientChecks(){this(false);}
    PixelShadows122ClientChecks(boolean bloomOnly){this(bloomOnly,false);}
    PixelShadows122ClientChecks(boolean bloomOnly,boolean ssgiOnly){this(bloomOnly,ssgiOnly,false);}
    PixelShadows122ClientChecks(boolean bloomOnly,boolean ssgiOnly,boolean pbrOnly){this(bloomOnly,ssgiOnly,pbrOnly,false);}
    PixelShadows122ClientChecks(boolean bloomOnly,boolean ssgiOnly,boolean pbrOnly,boolean closeupOnly){this(bloomOnly,ssgiOnly,pbrOnly,closeupOnly,false);}
-    PixelShadows122ClientChecks(boolean bloomOnly,boolean ssgiOnly,boolean pbrOnly,boolean closeupOnly,boolean sunshaftOnly){this.sunshaftOnly=sunshaftOnly;this.bloomOnly=bloomOnly;this.ssgiOnly=ssgiOnly;this.pbrOnly=pbrOnly;this.closeupOnly=closeupOnly;}
+    PixelShadows122ClientChecks(boolean bloomOnly,boolean ssgiOnly,boolean pbrOnly,boolean closeupOnly,boolean sunshaftOnly){this(bloomOnly,ssgiOnly,pbrOnly,closeupOnly,sunshaftOnly,false);}
+    PixelShadows122ClientChecks(boolean bloomOnly,boolean ssgiOnly,boolean pbrOnly,boolean closeupOnly,boolean sunshaftOnly,boolean coloredOnly){this.coloredOnly=coloredOnly;this.sunshaftOnly=sunshaftOnly;this.bloomOnly=bloomOnly;this.ssgiOnly=ssgiOnly;this.pbrOnly=pbrOnly;this.closeupOnly=closeupOnly;}
    private static final int FLOOR = 64;
    private static final AABB PILLAR = new AABB(0, FLOOR + 1, 0, 2, FLOOR + 9, 2);
    private static final BlockPos SLAB = new BlockPos(5, FLOOR + 3, -5);
@@ -51,6 +52,14 @@ public final class PixelShadows122ClientChecks implements FabricClientGameTest {

    @Override
    public void runTest(ClientGameTestContext c) {
+        c.runOnClient(m -> {
+            var info = com.mojang.blaze3d.systems.RenderSystem.getDevice().getDeviceInfo();
+            String expected = System.getProperty("sanctuary.test.graphicsBackend", "");
+            check(expected.isEmpty() || info.backendName().equalsIgnoreCase(expected),
+                    "Requested graphics backend must not silently fall back: " + expected + " / " + info.backendName());
+            System.out.println("SHADER139_BACKEND " + info.backendName() + " / " + info.name()
+                    + " / " + info.driverInfo() + " / zeroToOne=" + info.isZZeroToOne());
+        });
        var path = FabricLoader.getInstance().getConfigDir().resolve("sanctuary-shaders.json");
        final byte[] originalPreferences;
        try {
@@ -82,6 +91,9 @@ public final class PixelShadows122ClientChecks implements FabricClientGameTest {
                m.options.bobView().set(false);
                m.options.pauseOnLostFocus = false;
                m.options.setCameraType(CameraType.FIRST_PERSON);
+                String transparency = System.getProperty("sanctuary.test.improvedTransparency");
+                if (transparency != null) m.options.improvedTransparency().set(Boolean.parseBoolean(transparency));
+                System.out.println("SHADER139_TRANSPARENCY " + m.options.improvedTransparency().get());
                checkPreferences();
            });
            try (var world = c.worldBuilder().adjustSettings(s -> {
@@ -137,6 +149,7 @@ public final class PixelShadows122ClientChecks implements FabricClientGameTest {
                c.runOnClient(m -> check(VanillaLight.active(), "Native Sanctuary shader is active without an external engine"));
                float morning = c.computeOnClient(m -> m.gameRenderer.gameRenderState().levelRenderState.skyRenderState.sunAngle);

+                if(coloredOnly){ColoredLights139ClientChecks.run(c,server);return;}
                if(sunshaftOnly){Sunshafts137ClientChecks.run(c,server);return;}
                if(closeupOnly){SsgiCloseup135ClientChecks.run(c,server);Pbr134ClientChecks.run(c,server);return;}
                if(pbrOnly){Pbr134ClientChecks.run(c,server);return;}
@@ -268,7 +281,7 @@ public final class PixelShadows122ClientChecks implements FabricClientGameTest {
                                });
                    });
                    c.waitTicks(3);
-                    c.takeScreenshot("sanctuary-beta137-shader-options-" + locale);
+                    c.takeScreenshot("sanctuary-beta139-shader-options-" + locale);
                }
                c.runOnClient(m -> m.gui.setScreen(null));
            }
@@ -552,7 +565,7 @@ public final class PixelShadows122ClientChecks implements FabricClientGameTest {
    }

    static Frame capture(ClientGameTestContext c, String name) {
-        if (name != null) c.takeScreenshot("sanctuary-beta137-shader-" + name);
+        if (name != null) c.takeScreenshot("sanctuary-beta139-shader-" + name);
        var result = new CompletableFuture<Frame>();
        c.runOnClient(m -> Screenshot.takeScreenshot(m.gameRenderer.mainRenderTarget(), image -> {
            try (image) {
@@ -653,11 +666,11 @@ public final class PixelShadows122ClientChecks implements FabricClientGameTest {
    }

    private record Options(int distance, int simulationDistance, int fov, boolean bob,
-                           boolean pause, CameraType camera, String language) {
+                           boolean pause, CameraType camera, String language, boolean improvedTransparency) {
        static Options capture(Minecraft m) {
            return new Options(m.options.renderDistance().get(), m.options.simulationDistance().get(), m.options.fov().get(),
                    m.options.bobView().get(), m.options.pauseOnLostFocus,
-                    m.options.getCameraType(), m.getLanguageManager().getSelected());
+                    m.options.getCameraType(), m.getLanguageManager().getSelected(), m.options.improvedTransparency().get());
        }

        void restore(Minecraft m) {
@@ -667,6 +680,7 @@ public final class PixelShadows122ClientChecks implements FabricClientGameTest {
            m.options.bobView().set(bob);
            m.options.pauseOnLostFocus = pause;
            m.options.setCameraType(camera);
+            m.options.improvedTransparency().set(improvedTransparency);
            m.getLanguageManager().setSelected(language);
            m.getLanguageManager().onResourceManagerReload(m.getResourceManager());
        }
@@ -0,0 +1,39 @@
+package fr.koka.sanctuary.client.shader;
+
+import static fr.koka.sanctuary.client.shader.PixelShadows122ClientChecks.*;
+import static fr.koka.sanctuary.client.shader.Sunshafts137ClientChecks.*;
+import fr.koka.sanctuary.client.WeatherClient;
+import fr.koka.sanctuary.weather.DailyWeather;
+import net.fabricmc.fabric.api.client.gametest.v1.context.ClientGameTestContext;
+import net.fabricmc.fabric.api.client.gametest.v1.context.TestServerContext;
+
+/** Actual server weather -> native atmospheric fog -> shader scattering, same scene and manual strength. */
+final class SunshaftWeather138ClientChecks {
+    static void run(ClientGameTestContext c,TestServerContext server){
+        check(Sunshafts.fogDensity(1024)==0&&Sunshafts.fogDensity(192)==0&&Sunshafts.fogDensity(80)==1,"Clear and full fog endpoints");
+        float previous=0;for(int end=192;end>=80;end--){float d=Sunshafts.fogDensity(end);check(d>=previous&&d-previous<.014,"Fog density is bounded, smooth and monotonic");previous=d;}
+        check(Sunshafts.fogDensity(Float.POSITIVE_INFINITY)==0&&Sunshafts.fogDensity(Float.NaN)==0,"Invalid fog distance cannot create NaN shafts");
+        c.runOnClient(m->{VanillaLight.setSunshafts(false);VanillaLight.setSunshaftIntensity(35);VanillaLight.setPixelShadows(false);VanillaLight.setBloom(false);VanillaLight.setLensFlare(false);VanillaLight.setOreEmission(false);VanillaLight.setPbr(false);VanillaLight.setSsgi(false);VanillaLight.setEdgeHighlights(false);});
+        roof(server,1);camera(c,server,100.5,101,110.5,70);aim(c,server);
+        profile(c,server,DailyWeather.Kind.CLEAR);enable(c,false);var clearOff=capture(c,"weather-shafts-clear-off");enable(c,true);var clear=capture(c,"weather-shafts-clear-35");double clearEnergy=energy(clearOff,clear);
+        server.runOnServer(s->command(s,"weather fog"));c.waitFor(m->WeatherClient.state().kind()==DailyWeather.Kind.FOG,200);
+        float[] transition=new float[12];for(int i=0;i<transition.length;i++){c.waitTicks(20);transition[i]=c.computeOnClient(m->Sunshafts.fogDensity(m.gameRenderer.gameRenderState().levelRenderState.cameraRenderState.fogData.environmentalEnd));if(i>0)check(transition[i]>=transition[i-1]-.002&&transition[i]-transition[i-1]<.4,"Live fog transition has no abrupt density jump");}
+        c.runOnClient(m->{check(m.gameRenderer.gameRenderState().levelRenderState.cameraRenderState.fogData.environmentalEnd<=80.01,"Fog command reaches actual native FogData");check(Sunshafts.applied(),"Atmospheric fog does not disable rays");});
+        enable(c,false);var fogOff=capture(c,"weather-shafts-fog-off");enable(c,true);var fog=capture(c,"weather-shafts-fog-35");double fogEnergy=energy(fogOff,fog);
+        check(fogEnergy>clearEnergy*1.7,"Fog visibly thickens scattering at the same intensity: "+clearEnergy+" -> "+fogEnergy);unchanged(fog,capture(c,null),"Stable fog adds no animated noise");
+        var reload=c.computeOnClient(net.minecraft.client.Minecraft::reloadResourcePacks);c.waitFor(m->reload.isDone()&&m.gui.overlay()==null,1200);reload.join();settle(c);unchanged(fog,capture(c,"weather-shafts-fog-reload"),"Weather coupling survives shader reload");
+        roof(server,0);settle(c);enable(c,false);var sealedOff=capture(c,null);enable(c,true);unchanged(sealedOff,capture(c,"weather-shafts-fog-sealed"),"Dense fog cannot illuminate a sealed room through walls");roof(server,1);settle(c);
+        profile(c,server,DailyWeather.Kind.RAIN);enable(c,false);var rainOff=capture(c,"weather-shafts-rain-off");enable(c,true);double rainEnergy=energy(rainOff,capture(c,"weather-shafts-rain-35"));check(rainEnergy>0&&rainEnergy<fogEnergy,"Rain stays visible but below thick fog: "+rainEnergy);
+        profile(c,server,DailyWeather.Kind.THUNDER);enable(c,false);var stormOff=capture(c,"weather-shafts-storm-off");enable(c,true);double stormEnergy=energy(stormOff,capture(c,"weather-shafts-storm-35"));check(stormEnergy<rainEnergy*.8,"Storm clouds reduce available sunlight: "+stormEnergy+" / "+rainEnergy);
+        profile(c,server,DailyWeather.Kind.CLEAR);enable(c,true);var restored=capture(c,"weather-shafts-restored-clear");unchanged(clear,restored,"Returning to clear restores the original rays without accumulated brightness");
+        c.runOnClient(m->check(VanillaLight.sunshaftIntensity()==35,"Weather never changes the player's intensity setting"));
+        c.runOnClient(m->VanillaLight.setSunshaftIntensity(0));c.waitTicks(10);c.runOnClient(m->check(!Sunshafts.allocated(),"Zero still frees atmospheric scattering"));
+        System.out.println("SUNSHAFT138_WEATHER_PASS clear="+clearEnergy+" fog="+fogEnergy+" rain="+rainEnergy+" storm="+stormEnergy+" smooth transitions, native fog, closed room, reload, restored clear and manual setting");
+    }
+    private static void profile(ClientGameTestContext c,TestServerContext server,DailyWeather.Kind kind){
+        server.runOnServer(s->command(s,"sanctuary weather "+kind.key()));
+        c.waitFor(m->WeatherClient.state().active()&&WeatherClient.state().kind()==kind,200);
+        c.waitFor(m->(kind.raining()?m.level.getRainLevel(1)>.999:m.level.getRainLevel(1)<.001)&&(kind.thundering()?m.level.getThunderLevel(1)>.999:m.level.getThunderLevel(1)<.001),600);
+        c.waitTicks(240);
+    }
+}
@@ -50,14 +50,15 @@ public final class Sunshafts137ClientChecks implements FabricClientGameTest {
        c.runOnClient(m->{VanillaLight.setSunshafts(false);});c.waitTicks(10);c.runOnClient(m->check(!Sunshafts.allocated()&&PixelShadows.applied(),"OFF preserves independently enabled surface shadows"));
        for(String locale:new String[]{"fr_fr","en_us"})c.runOnClient(m->{m.getLanguageManager().setSelected(locale);m.getLanguageManager().onResourceManagerReload(m.getResourceManager());for(String suffix:new String[]{"sunshafts","sunshafts_help","sunshaft_intensity","sunshaft_intensity_help"}){String key="sanctuary.shaders."+suffix;check(!Component.translatable(key).getString().equals(key),"Localized volume controls: "+locale);}});
        System.out.println("SUNSHAFT137_PASS slotGain="+low+" leafGain="+leaf+" openGain="+open+" closed room, offscreen sun, camera return, proximity, reload/resize, shared map, zero/night, preferences, FR/EN");
+        SunshaftWeather138ClientChecks.run(c,server);
    }
-    private static void roof(TestServerContext server,int mode){server.runOnServer(s->{for(int x=76;x<=124;x++)for(int z=76;z<=124;z++)s.overworld().setBlockAndUpdate(new BlockPos(x,113,z),(mode==3||mode==1&&Math.floorMod(z,8)<3?Blocks.AIR:mode==2?Blocks.OAK_LEAVES:Blocks.OAK_PLANKS).defaultBlockState().trySetValue(net.minecraft.world.level.block.state.properties.BlockStateProperties.PERSISTENT,true));});}
-    private static void aim(ClientGameTestContext c,TestServerContext server){var d=c.computeOnClient(m->PixelShadows.sunDirection(m.gameRenderer.gameRenderState().levelRenderState.skyRenderState.sunAngle));look(c,server,Mth.wrapDegrees((float)Math.toDegrees(Math.atan2(-d.x,d.z))+25),-12);}
-    private static void settle(ClientGameTestContext c){int before=c.computeOnClient(m->Sunshafts.renderedFrames());c.waitFor(m->Sunshafts.applied()&&PixelShadows.ready()&&Sunshafts.renderedFrames()>before+10,1200);c.waitTicks(30);}
-    private static void enable(ClientGameTestContext c,boolean enabled){c.runOnClient(m->VanillaLight.setSunshafts(enabled));if(enabled)settle(c);else c.waitTicks(10);}
+    static void roof(TestServerContext server,int mode){server.runOnServer(s->{for(int x=76;x<=124;x++)for(int z=76;z<=124;z++)s.overworld().setBlockAndUpdate(new BlockPos(x,113,z),(mode==3||mode==1&&Math.floorMod(z,8)<3?Blocks.AIR:mode==2?Blocks.OAK_LEAVES:Blocks.OAK_PLANKS).defaultBlockState().trySetValue(net.minecraft.world.level.block.state.properties.BlockStateProperties.PERSISTENT,true));});}
+    static void aim(ClientGameTestContext c,TestServerContext server){var d=c.computeOnClient(m->PixelShadows.sunDirection(m.gameRenderer.gameRenderState().levelRenderState.skyRenderState.sunAngle));look(c,server,Mth.wrapDegrees((float)Math.toDegrees(Math.atan2(-d.x,d.z))+25),-12);}
+    static void settle(ClientGameTestContext c){int before=c.computeOnClient(m->Sunshafts.renderedFrames());c.waitFor(m->Sunshafts.applied()&&PixelShadows.ready()&&Sunshafts.renderedFrames()>before+10,1200);c.waitTicks(30);}
+    static void enable(ClientGameTestContext c,boolean enabled){c.runOnClient(m->VanillaLight.setSunshafts(enabled));if(enabled)settle(c);else c.waitTicks(10);}
    private static long gain(Frame off,Frame on){long sum=0;for(int i=0;i<off.pixels().length;i++)for(int shift:new int[]{0,8,16})sum+=Math.max(0,(on.pixels()[i]>>shift&255)-(off.pixels()[i]>>shift&255));return sum;}
    // Screen blending has less headroom on a brighter vanilla wall. Remove that factor
    // before comparing roofs, and exclude the roof itself where geometry changes.
-    private static double energy(Frame off,Frame on){double sum=0;int n=0;for(int y=off.height()/3;y<off.height();y++)for(int x=0;x<off.width();x++){int i=y*off.width()+x;for(int shift:new int[]{0,8,16}){int a=off.pixels()[i]>>shift&255,b=on.pixels()[i]>>shift&255;if(a<240){sum+=Math.max(0,b-a)/(255.0-a);n++;}}}return sum/Math.max(1,n);}
+    static double energy(Frame off,Frame on){double sum=0;int n=0;for(int y=off.height()/3;y<off.height();y++)for(int x=0;x<off.width();x++){int i=y*off.width()+x;for(int shift:new int[]{0,8,16}){int a=off.pixels()[i]>>shift&255,b=on.pixels()[i]>>shift&255;if(a<240){sum+=Math.max(0,b-a)/(255.0-a);n++;}}}return sum/Math.max(1,n);}
    private static void preferences(){try{var p=FabricLoader.getInstance().getConfigDir().resolve("sanctuary-shaders.json");Files.writeString(p,"{\"bloom\":false,\"pixelShadows\":false}");forgetPreferences();check(VanillaLight.sunshafts()&&VanillaLight.sunshaftIntensity()==35&&!VanillaLight.bloom()&&!VanillaLight.pixelShadows(),"Missing shaft settings preserve existing choices");VanillaLight.setSunshafts(false);VanillaLight.setSunshaftIntensity(73);forgetPreferences();check(!VanillaLight.sunshafts()&&VanillaLight.sunshaftIntensity()==73,"Custom shafts persist");for(int n:new int[]{-10,0,35,100,150}){VanillaLight.setSunshaftIntensity(n);forgetPreferences();check(VanillaLight.sunshaftIntensity()==Math.clamp(n,0,100),"Intensity clamps and persists");}VanillaLight.setSunshaftIntensity(35);}catch(java.io.IOException e){throw new AssertionError(e);}}
 }
@@ -0,0 +1,17 @@
+package fr.koka.sanctuary.gametest.mixin;
+
+import net.minecraft.client.renderer.Lightmap;
+import net.minecraft.client.renderer.state.LightmapRenderState;
+import org.spongepowered.asm.mixin.Mixin;
+import org.spongepowered.asm.mixin.injection.At;
+import org.spongepowered.asm.mixin.injection.Inject;
+import org.spongepowered.asm.mixin.injection.callback.CallbackInfo;
+
+/** Freeze only vanilla torch flicker for image comparisons; never packaged in the mod. */
+@Mixin(Lightmap.class)
+public abstract class Colored139LightmapProbeMixin {
+    @Inject(method="render",at=@At("HEAD"))
+    private void stableBlockLight(LightmapRenderState state,CallbackInfo ci){
+        if(Boolean.getBoolean("sanctuary.test.freezeBlockFlicker")){state.blockFactor=1;state.needsUpdate=true;}
+    }
+}
@@ -10,6 +10,7 @@
    "defaultRequire": 1
  },
  "client": [
+    "Colored139LightmapProbeMixin",
    "Fourneau094ParticleProbeMixin",
    "Tooltip093FontProbeMixin",
    "ClientVsync046Mixin",
@@ -0,0 +1,58 @@
+package fr.koka.sanctuary.client.shader;
+
+import java.util.*;
+import net.minecraft.client.Minecraft;
+import net.minecraft.core.Direction;
+import net.minecraft.core.registries.BuiltInRegistries;
+import net.minecraft.resources.Identifier;
+import net.minecraft.util.RandomSource;
+import net.minecraft.world.level.block.state.BlockState;
+import net.minecraft.client.renderer.block.dispatch.BlockStateModelPart;
+
+/** Colours are analysed once per state/resource reload, never from rendered GPU pixels. */
+final class ColoredLightMaterials {
+    private final Map<BlockState,Integer> colors=new IdentityHashMap<>();
+    private final Map<Identifier,Integer> sprites=new HashMap<>();
+    int color(BlockState state){return colors.computeIfAbsent(state,this::analyse);}
+    private int analyse(BlockState state){
+        var id=BuiltInRegistries.BLOCK.getKey(state.getBlock());String name=id.getPath();
+        if(id.getNamespace().equals("minecraft")){
+            if(name.startsWith("soul_"))return 0x55BDFF;
+            if(name.contains("redstone"))return 0xFF3020;
+            if(name.equals("pearlescent_froglight"))return 0xFFC0EC;
+            if(name.equals("verdant_froglight"))return 0xB4FF82;
+            if(name.equals("ochre_froglight"))return 0xFFCD72;
+            if(name.contains("torch")||name.equals("lantern")||name.equals("fire")||name.equals("campfire")||name.equals("lava"))return 0xFFAB55;
+        }
+        var parts=new ArrayList<BlockStateModelPart>();
+        Minecraft.getInstance().getModelManager().getBlockStateModelSet().get(state).collectParts(RandomSource.create(0),parts);
+        var used=new HashSet<Identifier>();long r=0,g=0,b=0;int count=0;
+        for(var part:parts)for(int f=0;f<7;f++)for(var quad:part.getQuads(f==6?null:Direction.values()[f])){
+            var sprite=quad.materialInfo().sprite().contents().name();if(!used.add(sprite))continue;
+            int color=sprites.computeIfAbsent(sprite,this::sample);if(color<0)continue;
+            r+=color>>16&255;g+=color>>8&255;b+=color&255;count++;
+        }
+        if(count==0)return 0xFFFFFF;
+        return normalize((float)r/count,(float)g/count,(float)b/count);
+    }
+    private int sample(Identifier id){
+        try(var image=BloomMaterials.read(id)){
+            double r=0,g=0,b=0,weight=0;
+            // First animation frame; bounded sampling also covers high-resolution packs.
+            int w=image.getWidth(),h=Math.min(w,image.getHeight()),step=Math.max(1,Math.max(w,h)/32);
+            for(int y=0;y<h;y+=step)for(int x=0;x<w;x+=step){
+                int c=image.getPixel(x,y);if((c>>>24)<128)continue;
+                int cr=c>>16&255,cg=c>>8&255,cb=c&255,max=Math.max(cr,Math.max(cg,cb)),min=Math.min(cr,Math.min(cg,cb));
+                double k=Math.max(0,(max-96)/159.0);k*=k*(.2+(max-min)/255.0);
+                r+=cr*k;g+=cg*k;b+=cb*k;weight+=k;
+            }
+            return weight<.001?-1:normalize((float)(r/weight),(float)(g/weight),(float)(b/weight));
+        }catch(java.io.IOException e){return -1;}
+    }
+    private static int normalize(float r,float g,float b){
+        float max=Math.max(1,Math.max(r,Math.max(g,b)));
+        return Math.round(r/max*255)<<16|Math.round(g/max*255)<<8|Math.round(b/max*255);
+    }
+    void clear(){colors.clear();sprites.clear();}
+    int cachedStates(){return colors.size();}
+}
@@ -0,0 +1,116 @@
+package fr.koka.sanctuary.client.shader;
+
+import com.mojang.blaze3d.platform.NativeImage;
+import it.unimi.dsi.fastutil.ints.IntArrayFIFOQueue;
+import net.minecraft.client.Minecraft;
+import net.minecraft.client.multiplayer.ClientLevel;
+import net.minecraft.client.renderer.texture.DynamicTexture;
+import net.minecraft.core.BlockPos;
+import net.minecraft.core.Direction;
+import net.minecraft.world.level.LightLayer;
+import net.minecraft.world.level.block.Blocks;
+import net.minecraft.world.level.block.state.BlockState;
+import net.minecraft.world.level.chunk.LevelChunk;
+import net.minecraft.world.level.chunk.status.ChunkStatus;
+
+/** Client-only RGB propagation. Snapshot, flood and packing share a bounded per-frame work budget. */
+final class ColoredLightVolume implements AutoCloseable {
+    static final int SIDE=64,COUNT=SIDE*SIDE*SIDE,ATLAS=512;
+    private static final Direction[] DIRECTIONS=Direction.values();
+    private final ColoredLightMaterials materials=new ColoredLightMaterials();
+    private ClientLevel level;
+    private Object models;
+    private Build build;
+    private DynamicTexture texture;
+    private BlockPos origin;
+    private long revision,published=-1,lastStart;
+    private int completed;
+    void update(){
+        var mc=Minecraft.getInstance();var modelSet=mc.getModelManager().getBlockStateModelSet();
+        if(level!=mc.level||models!=modelSet){close();level=mc.level;models=modelSet;}
+        var p=mc.gameRenderer.gameRenderState().levelRenderState.cameraRenderState.pos;
+        var wanted=new BlockPos(anchor(p.x),anchor(p.y),anchor(p.z));
+        long now=System.nanoTime();
+        // Complete a snapshot even if the world keeps changing, then catch up; moving
+        // beyond it cancels immediately. Static worlds do no further scanning or flooding.
+        if(build!=null&&!inside(build.origin,BlockPos.containing(p))){build.close();build=null;}
+        if(build==null&&(texture==null||!wanted.equals(origin)||published!=revision)&&now-lastStart>=100_000_000L){
+            build=new Build(level,wanted,revision,materials);lastStart=now;
+        }
+        if(build!=null&&build.advance(now+2_000_000L)){
+            if(texture==null)texture=new DynamicTexture(()->"Sanctuary coloured light volume",build.takeImage());
+            else {texture.setPixels(build.takeImage());texture.upload();}
+            origin=build.origin;published=build.revision;build.close();build=null;completed++;
+        }
+    }
+    private static int anchor(double p){return Math.floorDiv((int)Math.floor(p),4)*4-SIDE/2;}
+    private static boolean inside(BlockPos base,BlockPos p){return p.getX()>=base.getX()&&p.getX()<base.getX()+SIDE&&p.getY()>=base.getY()&&p.getY()<base.getY()+SIDE&&p.getZ()>=base.getZ()&&p.getZ()<base.getZ()+SIDE;}
+    void dirty(BlockPos p){if(origin!=null&&inside(origin,p)||build!=null&&inside(build.origin,p))revision++;}
+    void dirtyChunk(int x,int z){if(overlaps(origin,x,z)||build!=null&&overlaps(build.origin,x,z))revision++;}
+    void dirtySection(int x,int y,int z){if(overlapsSection(origin,x,y,z)||build!=null&&overlapsSection(build.origin,x,y,z))revision++;}
+    private static boolean overlapsSection(BlockPos o,int x,int y,int z){return overlaps(o,x,z)&&y>=(o.getY()>>4)&&y<=((o.getY()+SIDE-1)>>4);}
+    private static boolean overlaps(BlockPos o,int x,int z){return o!=null&&x>=(o.getX()>>4)&&x<=((o.getX()+SIDE-1)>>4)&&z>=(o.getZ()>>4)&&z<=((o.getZ()+SIDE-1)>>4);}
+    DynamicTexture texture(){return texture;}
+    BlockPos origin(){return origin;}
+    boolean settled(){return texture!=null&&build==null&&revision==published;}
+    int completed(){return completed;}
+    int cachedStates(){return materials.cachedStates();}
+    int sample(BlockPos p){if(texture==null||!inside(origin,p))return 0;int x=p.getX()-origin.getX(),y=p.getY()-origin.getY(),z=p.getZ()-origin.getZ();return texture.getPixels().getPixel(x+(y&7)*SIDE,z+(y>>3)*SIDE);}
+    public void close(){if(build!=null){build.close();build=null;}if(texture!=null){texture.close();texture=null;}materials.clear();level=null;models=null;origin=null;published=-1;revision=0;lastStart=0;}
+
+    private static final class Build implements AutoCloseable {
+        final ClientLevel level;final BlockPos origin;final long revision;final ColoredLightMaterials materials;
+        final BlockState[] states=new BlockState[COUNT];
+        final byte[] red=new byte[COUNT],green=new byte[COUNT],blue=new byte[COUNT],sky=new byte[COUNT];
+        final boolean[] queued=new boolean[COUNT];final IntArrayFIFOQueue queue=new IntArrayFIFOQueue();
+        final LevelChunk[] chunks=new LevelChunk[25];final int cx,cz;
+        final BlockPos.MutableBlockPos pos=new BlockPos.MutableBlockPos();
+        NativeImage image=new NativeImage(ATLAS,ATLAS,false);int scan,packed;
+        Build(ClientLevel level,BlockPos origin,long revision,ColoredLightMaterials materials){
+            this.level=level;this.origin=origin;this.revision=revision;this.materials=materials;
+            cx=origin.getX()>>4;cz=origin.getZ()>>4;
+            for(int z=0;z<5;z++)for(int x=0;x<5;x++)chunks[x+z*5]=level.getChunkSource().getChunk(cx+x,cz+z,ChunkStatus.FULL,false);
+        }
+        boolean advance(long deadline){
+            while(scan<COUNT){scan(scan++);if((scan&127)==0&&System.nanoTime()>=deadline)return false;}
+            int work=0;
+            while(!queue.isEmpty()){
+                int i=queue.dequeueInt();queued[i]=false;spread(i);
+                if((++work&127)==0&&System.nanoTime()>=deadline)return false;
+            }
+            while(packed<COUNT){
+                int i=packed++,x=i&63,z=i>>6&63,y=i>>12;
+                image.setPixel(x+(y&7)*SIDE,z+(y>>3)*SIDE,(sky[i]&255)<<24|(red[i]&255)<<16|(green[i]&255)<<8|(blue[i]&255));
+                if((packed&511)==0&&System.nanoTime()>=deadline)return false;
+            }
+            return true;
+        }
+        void scan(int i){
+            int x=origin.getX()+(i&63),z=origin.getZ()+(i>>6&63),y=origin.getY()+(i>>12);pos.set(x,y,z);
+            var chunk=chunks[((x>>4)-cx)+((z>>4)-cz)*5];
+            var state=chunk==null||level.isOutsideBuildHeight(y)?Blocks.BEDROCK.defaultBlockState():chunk.getBlockState(pos);states[i]=state;
+            if(chunk!=null&&!level.isOutsideBuildHeight(y))sky[i]=(byte)(level.getBrightness(LightLayer.SKY,pos)*17);
+            int emission=state.getLightEmission();if(emission<=0)return;
+            int c=materials.color(state);red[i]=(byte)encode(emission,c>>16&255);green[i]=(byte)encode(emission,c>>8&255);blue[i]=(byte)encode(emission,c&255);enqueue(i);
+        }
+        void spread(int i){
+            int r=red[i]&255,g=green[i]&255,b=blue[i]&255;if(Math.max(r,Math.max(g,b))<=16)return;
+            int x=i&63,z=i>>6&63,y=i>>12;
+            for(var d:DIRECTIONS){
+                int nx=x+d.getStepX(),ny=y+d.getStepY(),nz=z+d.getStepZ();if(nx<0||nx>=SIDE||ny<0||ny>=SIDE||nz<0||nz>=SIDE)continue;
+                int n=nx+(nz<<6)+(ny<<12);
+                if(r-16<=(red[n]&255)&&g-16<=(green[n]&255)&&b-16<=(blue[n]&255))continue;
+                int loss=net.minecraft.world.level.lighting.LightEngine.getLightDampeningInto(states[i],states[n],d,Math.max(1,states[n].getLightDampening()))*16;
+                int nr=Math.max(0,r-loss),ng=Math.max(0,g-loss),nb=Math.max(0,b-loss);boolean changed=false;
+                if(nr>(red[n]&255)){red[n]=(byte)nr;changed=true;}if(ng>(green[n]&255)){green[n]=(byte)ng;changed=true;}if(nb>(blue[n]&255)){blue[n]=(byte)nb;changed=true;}
+                if(changed)enqueue(n);
+            }
+        }
+        void enqueue(int i){if(!queued[i]){queued[i]=true;queue.enqueue(i);}}
+        NativeImage takeImage(){var result=image;image=null;return result;}
+        public void close(){if(image!=null){image.close();image=null;}}
+    }
+    // Logarithmic channels keep the source hue as light loses one native level per
+    // block. Independent maxima mix overlapping colours without summing unbounded light.
+    static int encode(int emission,int channel){return channel==0?0:Math.clamp((int)Math.round((emission+Math.log(channel/255.0)/Math.log(1.25))*16),0,240);}
+}
@@ -0,0 +1,78 @@
+package fr.koka.sanctuary.client.shader;
+
+import com.mojang.blaze3d.buffers.Std140Builder;
+import com.mojang.blaze3d.pipeline.TextureTarget;
+import com.mojang.blaze3d.systems.RenderSystem;
+import com.mojang.renderpearl.api.GpuFormat;
+import com.mojang.renderpearl.api.buffers.GpuBuffer;
+import com.mojang.renderpearl.api.pipeline.*;
+import com.mojang.renderpearl.api.textures.FilterMode;
+import fr.koka.sanctuary.client.panorama.PanoramaCapture;
+import java.util.Optional;
+import net.minecraft.client.Minecraft;
+import net.minecraft.client.renderer.MappableRingBuffer;
+import net.minecraft.client.renderer.RenderPipelines;
+import net.minecraft.core.BlockPos;
+import net.minecraft.resources.Identifier;
+import net.minecraft.world.level.material.FogType;
+import org.joml.Matrix4f;
+
+/** Visual local colour only: native block/sky light and gameplay remain unchanged. */
+public final class ColoredLights {
+    private static final RenderPipeline APPLY=RenderPipelines.register(RenderPipeline.builder()
+            .withLocation(Identifier.parse("sanctuary:pipeline/colored_lights"))
+            .withVertexShader("core/screenquad").withFragmentShader(Identifier.parse("sanctuary:core/colored_lights"))
+            .withBindGroupLayout(BindGroupLayout.builder().withUniform("ColoredLightScene",UniformType.UNIFORM_BUFFER)
+                    .withUniform("WorldDepth",UniformType.COMBINED_IMAGE_SAMPLER)
+                    .withUniform("SceneColor",UniformType.COMBINED_IMAGE_SAMPLER)
+                    .withUniform("LightVolume",UniformType.COMBINED_IMAGE_SAMPLER).build())
+            .withPrimitiveTopology(PrimitiveTopology.TRIANGLES).withCull(false)
+            .withColorTargetState(new ColorTargetState(Optional.of(new BlendFunction(BlendFactor.ONE,BlendFactor.ZERO,BlendFactor.ZERO,BlendFactor.ONE)),GpuFormat.RGBA8_UNORM,ColorTargetState.WRITE_COLOR))
+            .withDepthStencilState(Optional.empty()).build());
+    private static final ColoredLightVolume VOLUME=new ColoredLightVolume();
+    private static final Matrix4f projection=new Matrix4f();
+    private static TextureTarget source;
+    private static MappableRingBuffer uniforms;
+    private static boolean applied;
+    private static int frames;
+    private ColoredLights(){}
+    public static void captureProjection(Matrix4f matrix){projection.set(matrix);}
+    public static void dirtyBlock(BlockPos pos){VOLUME.dirty(pos);}
+    public static void dirtyChunk(int x,int z){VOLUME.dirtyChunk(x,z);}
+    public static void dirtySection(int x,int y,int z){VOLUME.dirtySection(x,y,z);}
+    public static void render(){
+        applied=false;var mc=Minecraft.getInstance();
+        if(!VanillaLight.active()||!VanillaLight.coloredLights()||VanillaLight.coloredLightIntensity()==0||mc.level==null){release();return;}
+        if(PanoramaCapture.rendering())return;
+        var camera=mc.gameRenderer.gameRenderState().levelRenderState.cameraRenderState;
+        if(camera.fogType!=FogType.NONE)return;
+        VOLUME.update();if(VOLUME.texture()==null)return;
+        var main=mc.gameRenderer.mainRenderTarget();
+        if(source==null||source.width!=main.width||source.height!=main.height){if(source!=null)source.destroyBuffers();source=new TextureTarget("Sanctuary coloured light source",main.width,main.height,GpuFormat.RGBA8_UNORM,null);}
+        if(uniforms==null)uniforms=new MappableRingBuffer(()->"Sanctuary coloured light scene",GpuBuffer.USAGE_UNIFORM|GpuBuffer.USAGE_MAP_WRITE,128);
+        var base=VOLUME.origin();var fog=camera.fogData;
+        uniforms.rotate();try(var mapped=uniforms.currentBuffer().map(false,true)){
+            Std140Builder.intoBuffer(mapped.data()).putMat4f(new Matrix4f(projection).mul(camera.viewRotationMatrix).invert())
+                    .putVec4((float)(camera.pos.x-base.getX()),(float)(camera.pos.y-base.getY()),(float)(camera.pos.z-base.getZ()),VanillaLight.coloredLightIntensity()/100f)
+                    .putVec4(RenderSystem.getDevice().getDeviceInfo().isZZeroToOne()?1:0,Math.clamp((15-mc.level.getSkyDarken())/15f,0,1),fog.color.w,0)
+                    .putVec4(fog.renderDistanceStart,fog.renderDistanceEnd,fog.environmentalStart,fog.environmentalEnd)
+                    .putVec4(ColoredLightVolume.SIDE,14,4,0);
+        }
+        var encoder=RenderSystem.getDevice().createCommandEncoder();
+        encoder.copyTextureToTexture(main.getColorTexture(),source.getColorTexture(),0,0,0,0,0,main.width,main.height);
+        var nearest=RenderSystem.getSamplerCache().getClampToEdge(FilterMode.NEAREST);
+        try(var pass=encoder.createRenderPass(()->"Sanctuary coloured light",main.getColorTextureView(),Optional.empty())){
+            pass.setPipeline(RenderSystem.getCompiledPipeline(APPLY));pass.setUniform("ColoredLightScene",uniforms.currentBuffer());
+            pass.setUniform("WorldDepth",main.getDepthTextureView(),nearest);pass.setUniform("SceneColor",source.getColorTextureView(),nearest);pass.setUniform("LightVolume",VOLUME.texture().getTextureView(),nearest);pass.draw(3,1,0,0);
+        }
+        applied=true;frames++;
+    }
+    public static void release(){VOLUME.close();if(source!=null){source.destroyBuffers();source=null;}if(uniforms!=null){uniforms.close();uniforms=null;}applied=false;}
+    static boolean applied(){return applied;}
+    static boolean allocated(){return source!=null||VOLUME.texture()!=null;}
+    static boolean settled(){return VOLUME.settled();}
+    static int renderedFrames(){return frames;}
+    static int builds(){return VOLUME.completed();}
+    static int sample(BlockPos pos){return VOLUME.sample(pos);}
+    static int materials(){return VOLUME.cachedStates();}
+}
@@ -91,7 +91,10 @@ public final class PixelShadows {
        float moon = sky.moonPhase == null ? 1 : (float)(.5 + .5 * Math.cos(sky.moonPhase.index() * Math.PI / 4));
        float strength = (lunar ? .10f * moon : .38f)
                * Math.clamp((sun.y - .08f) / .16f, 0, 1) * sky.rainBrightness;
-        if (strength <= .001f) return;
+        // Rain hides the native solar sprite completely. The atmospheric volume still
+        // needs occluders for its weak scattered daylight; surface shadows stay off.
+        boolean solarVolume=!lunar&&VanillaLight.sunshafts()&&VanillaLight.sunshaftIntensity()>0;
+        if (strength <= .001f && !solarVolume) return;
        int distance = VanillaLight.shadowDistance(), pixels = VanillaLight.shadowPixels();
        TERRAIN.update(client.level, camera.pos, distance, sun);
        int size = mapSize(distance, pixels);
@@ -142,7 +145,7 @@ public final class PixelShadows {
            }
        }
        depthReady = !lunar;
-        if (!VanillaLight.pixelShadows()) { renderedFrames++; return; }
+        if (!VanillaLight.pixelShadows() || strength <= .001f) { renderedFrames++; return; }
        var main = client.gameRenderer.mainRenderTarget();
        var nearest = RenderSystem.getSamplerCache().getClampToEdge(FilterMode.NEAREST);
        try (var pass = encoder.createRenderPass(() -> "Sanctuary pixel shadows", main.getColorTextureView(), Optional.empty())) {
@@ -23,6 +23,9 @@ public final class ShaderOptionsScreen extends OptionsSubScreen {
        list.addBig(OptionInstance.createBoolean("sanctuary.shaders.pbr",OptionInstance.cachedConstantTooltip(
                Component.translatable("sanctuary.shaders.pbr_help")),VanillaLight.pbr(),VanillaLight::setPbr));
        slider("pbr_intensity",VanillaLight.pbrIntensity(),VanillaLight::setPbrIntensity);
+        list.addBig(OptionInstance.createBoolean("sanctuary.shaders.colored_lights",OptionInstance.cachedConstantTooltip(
+                Component.translatable("sanctuary.shaders.colored_lights_help")),VanillaLight.coloredLights(),VanillaLight::setColoredLights));
+        slider("colored_light_intensity",VanillaLight.coloredLightIntensity(),VanillaLight::setColoredLightIntensity);
        list.addBig(OptionInstance.createBoolean("sanctuary.shaders.ssgi",OptionInstance.cachedConstantTooltip(
                Component.translatable("sanctuary.shaders.ssgi_help")),VanillaLight.ssgi(),VanillaLight::setSsgi));
        slider("ssgi_intensity",VanillaLight.ssgiIntensity(),VanillaLight::setSsgiIntensity);
@@ -45,11 +45,21 @@ public final class Sunshafts {
        if(!PixelShadows.depthReady()){release();return;}
        var main=mc.gameRenderer.mainRenderTarget();int width=Math.max(1,(main.width+3)/4),height=Math.max(1,(main.height+3)/4);
        if(light==null||light.width!=width||light.height!=height){release();light=new TextureTarget("Sanctuary sunshafts",width,height,GpuFormat.RGBA16_FLOAT,null);}
-        if(settings==null)settings=new MappableRingBuffer(()->"Sanctuary sunshafts",GpuBuffer.USAGE_UNIFORM|GpuBuffer.USAGE_MAP_WRITE,32);
-        var fog=mc.gameRenderer.gameRenderState().levelRenderState.cameraRenderState.fogData;
+        if(settings==null)settings=new MappableRingBuffer(()->"Sanctuary sunshafts",GpuBuffer.USAGE_UNIFORM|GpuBuffer.USAGE_MAP_WRITE,48);
+        var camera=mc.gameRenderer.gameRenderState().levelRenderState.cameraRenderState;
+        var fog=camera.fogData;
+        float mist=fogDensity(fog.environmentalEnd);
+        float rain=mc.level.getRainLevel(camera.cameraEntityPartialTicks);
+        float thunder=mc.level.getThunderLevel(camera.cameraEntityPartialTicks);
+        var sun=PixelShadows.sunDirection(mc.gameRenderer.gameRenderState().levelRenderState.skyRenderState.sunAngle);
+        float daylight=Math.clamp((sun.y-.08f)/.16f,0,1)*(1-.75f*rain)*(1-.65f*thunder);
+        float density=1+2.5f*mist+.8f*rain;
+        float spread=Math.max(mist,.35f*rain);
+        float extinction=1+.7f*mist+.25f*rain;
        settings.rotate();try(var mapped=settings.currentBuffer().map(false,true)){
            Std140Builder.intoBuffer(mapped.data()).putVec4(.85f+.15f*fog.color.x,.78f+.15f*fog.color.y,.66f+.15f*fog.color.z,0)
-                    .putVec4(VanillaLight.sunshaftIntensity()/100f,Math.min(64,VanillaLight.shadowDistance()*.5f),0,0);
+                    .putVec4(VanillaLight.sunshaftIntensity()/100f,Math.min(64,VanillaLight.shadowDistance()*.5f),0,0)
+                    .putVec4(density,spread,extinction,daylight);
        }
        var encoder=RenderSystem.getDevice().createCommandEncoder();var nearest=RenderSystem.getSamplerCache().getClampToEdge(FilterMode.NEAREST);
        try(var pass=encoder.createRenderPass(()->"Sanctuary solar volume",light.getColorTextureView(),Optional.empty())){
@@ -62,6 +72,12 @@ public final class Sunshafts {
        }
        applied=true;frames++;
    }
+    /** Environmental fog has its own end distance; changing render distance is not weather. */
+    static float fogDensity(float environmentalEnd){
+        if(!Float.isFinite(environmentalEnd))return 0;
+        float t=Math.clamp((192-environmentalEnd)/112,0,1);
+        return t*t*(3-2*t);
+    }
    public static void release(){if(light!=null){light.destroyBuffers();light=null;}if(settings!=null){settings.close();settings=null;}applied=false;}
    static boolean applied(){return applied;}
    static boolean allocated(){return light!=null;}
@@ -26,6 +26,8 @@ public final class VanillaLight {
        boolean pbr=true;
        int pbrIntensity=50;
        boolean ssgi=true;
+        boolean coloredLights=false;
+        int coloredLightIntensity=35;
        int ssgiIntensity=35;
        int bloomIntensity=20;
        int bloomRadius=50;
@@ -46,6 +48,7 @@ public final class VanillaLight {
            preferences.sunshaftIntensity=Math.clamp(preferences.sunshaftIntensity,0,100);
            preferences.lensFlareIntensity=Math.clamp(preferences.lensFlareIntensity,0,100);
            preferences.pbrIntensity=Math.clamp(preferences.pbrIntensity,0,100);
+            preferences.coloredLightIntensity=Math.clamp(preferences.coloredLightIntensity,0,100);
            preferences.ssgiIntensity=Math.clamp(preferences.ssgiIntensity,0,100);
            preferences.bloomIntensity=Math.clamp(preferences.bloomIntensity,0,100);
            preferences.bloomRadius=Math.clamp(preferences.bloomRadius,0,100);
@@ -79,6 +82,10 @@ public final class VanillaLight {
    public static int pbrIntensity(){enabled();return preferences.pbrIntensity;}
    public static void setPbr(boolean value){enabled();preferences.pbr=value;save();}
    public static void setPbrIntensity(int value){enabled();preferences.pbrIntensity=Math.clamp(value,0,100);save();}
+    public static boolean coloredLights(){enabled();return preferences.coloredLights;}
+    public static int coloredLightIntensity(){enabled();return preferences.coloredLightIntensity;}
+    public static void setColoredLights(boolean value){enabled();preferences.coloredLights=value;save();}
+    public static void setColoredLightIntensity(int value){enabled();preferences.coloredLightIntensity=Math.clamp(value,0,100);save();}
    public static boolean ssgi(){enabled();return preferences.ssgi;}
    public static int ssgiIntensity(){enabled();return preferences.ssgiIntensity;}
    public static void setSsgi(boolean value){enabled();preferences.ssgi=value;save();}
@@ -1,6 +1,7 @@
 package fr.koka.sanctuary.mixin.client;

 import fr.koka.sanctuary.client.shader.PixelShadows;
+import fr.koka.sanctuary.client.shader.ColoredLights;
 import fr.koka.sanctuary.client.shader.ProceduralPbr;
 import fr.koka.sanctuary.client.shader.Bloom;
 import fr.koka.sanctuary.client.shader.ScreenSpaceGI;
@@ -16,10 +17,10 @@ import org.spongepowered.asm.mixin.injection.callback.CallbackInfo;
 abstract class PixelShadowDirtyMixin {
    @Inject(method="blockChanged", at=@At("HEAD"))
    private void sanctuary$dirty(BlockPos pos, int flags, CallbackInfo ci) {
-        PixelShadows.dirtyBlock(pos); ProceduralPbr.dirtyBlock(pos); Bloom.dirtyBlock(pos);
+        PixelShadows.dirtyBlock(pos); ProceduralPbr.dirtyBlock(pos); Bloom.dirtyBlock(pos); ColoredLights.dirtyBlock(pos);
    }
    @Inject(method="allChanged", at=@At("HEAD"))
-    private void sanctuary$reload(CallbackInfo ci) { PixelShadows.release(); ProceduralPbr.release(); Bloom.release(); ScreenSpaceGI.release(); }
+    private void sanctuary$reload(CallbackInfo ci) { PixelShadows.release(); ProceduralPbr.release(); Bloom.release(); ColoredLights.release(); ScreenSpaceGI.release(); }
    @Inject(method="setSectionDirty", at=@At("HEAD"))
-    private void sanctuary$pbrLight(int x,int y,int z,CallbackInfo ci){ProceduralPbr.dirtySection(x,y,z);}
+    private void sanctuary$pbrLight(int x,int y,int z,CallbackInfo ci){ProceduralPbr.dirtySection(x,y,z); ColoredLights.dirtySection(x,y,z);}
 }
@@ -1,6 +1,7 @@
 package fr.koka.sanctuary.mixin.client;

 import fr.koka.sanctuary.client.shader.PixelShadows;
+import fr.koka.sanctuary.client.shader.ColoredLights;
 import fr.koka.sanctuary.client.shader.ProceduralPbr;
 import fr.koka.sanctuary.client.shader.Bloom;
 import net.minecraft.client.multiplayer.ClientLevel;
@@ -17,11 +18,11 @@ import org.spongepowered.asm.mixin.injection.callback.CallbackInfo;
 abstract class PixelShadowLevelMixin {
    @Inject(method="setBlocksDirty", at=@At("HEAD"))
    private void sanctuary$block(BlockPos pos, BlockState before, BlockState after, CallbackInfo ci) {
-        if (before != after) {PixelShadows.dirtyBlock(pos); ProceduralPbr.dirtyBlock(pos);Bloom.dirtyBlock(pos);}
+        if (before != after) {PixelShadows.dirtyBlock(pos); ProceduralPbr.dirtyBlock(pos);Bloom.dirtyBlock(pos); ColoredLights.dirtyBlock(pos);}
    }

    @Inject(method="onChunkLoaded", at=@At("TAIL"))
-    private void sanctuary$loaded(ChunkPos pos, CallbackInfo ci) { PixelShadows.dirtyChunk(pos.x(), pos.z()); ProceduralPbr.dirtyChunk(pos.x(), pos.z()); Bloom.dirtyChunk(pos.x(), pos.z()); }
+    private void sanctuary$loaded(ChunkPos pos, CallbackInfo ci) { PixelShadows.dirtyChunk(pos.x(), pos.z()); ProceduralPbr.dirtyChunk(pos.x(), pos.z()); Bloom.dirtyChunk(pos.x(), pos.z()); ColoredLights.dirtyChunk(pos.x(),pos.z()); }
    @Inject(method="unload", at=@At("HEAD"))
-    private void sanctuary$unload(LevelChunk chunk, CallbackInfo ci) { PixelShadows.dirtyChunk(chunk.getPos().x(), chunk.getPos().z()); ProceduralPbr.dirtyChunk(chunk.getPos().x(), chunk.getPos().z()); Bloom.dirtyChunk(chunk.getPos().x(), chunk.getPos().z()); }
+    private void sanctuary$unload(LevelChunk chunk, CallbackInfo ci) { PixelShadows.dirtyChunk(chunk.getPos().x(), chunk.getPos().z()); ProceduralPbr.dirtyChunk(chunk.getPos().x(), chunk.getPos().z()); Bloom.dirtyChunk(chunk.getPos().x(), chunk.getPos().z()); ColoredLights.dirtyChunk(chunk.getPos().x(),chunk.getPos().z()); }
 }
@@ -4,6 +4,7 @@ import com.llamalad7.mixinextras.injector.wrapoperation.Operation;
 import com.llamalad7.mixinextras.injector.wrapoperation.WrapOperation;
 import com.mojang.renderpearl.api.buffers.GpuBufferSlice;
 import fr.koka.sanctuary.client.shader.PixelShadows;
+import fr.koka.sanctuary.client.shader.ColoredLights;
 import fr.koka.sanctuary.client.shader.ProceduralPbr;
 import fr.koka.sanctuary.client.shader.EdgeHighlights;
 import fr.koka.sanctuary.client.shader.Bloom;
@@ -25,11 +26,12 @@ abstract class PixelShadowRendererMixin {
        ProceduralPbr.captureProjection(matrix);
        EdgeHighlights.captureProjection(matrix);
        Bloom.captureProjection(matrix);
+        ColoredLights.captureProjection(matrix);
        ScreenSpaceGI.captureProjection(matrix);
        return original.call(buffer, matrix);
    }
    @Inject(method="renderLevel", at=@At(value="INVOKE", target="Lnet/minecraft/client/renderer/GameRenderer;render3dHud(Lnet/minecraft/client/renderer/state/level/CameraRenderState;Lnet/minecraft/client/renderer/state/level/PlayerRenderState;Lnet/minecraft/client/renderer/state/OptionsRenderState;Z)V"))
-    private void sanctuary$shadows(CallbackInfo ci) { PixelShadows.render(); ProceduralPbr.render(); ScreenSpaceGI.render(); EdgeHighlights.render(); Bloom.render(); Sunshafts.render(); }
+    private void sanctuary$shadows(CallbackInfo ci) { PixelShadows.render(); ProceduralPbr.render(); ColoredLights.render(); ScreenSpaceGI.render(); EdgeHighlights.render(); Bloom.render(); Sunshafts.render(); }
    @Inject(method={"close", "setLevel"}, at=@At("HEAD"))
-    private void sanctuary$close(CallbackInfo ci) { PixelShadows.release(); ProceduralPbr.release(); EdgeHighlights.release(); Bloom.release(); ScreenSpaceGI.release(); Sunshafts.release(); }
+    private void sanctuary$close(CallbackInfo ci) { PixelShadows.release(); ProceduralPbr.release(); EdgeHighlights.release(); Bloom.release(); ColoredLights.release(); ScreenSpaceGI.release(); Sunshafts.release(); }
 }
@@ -2307,6 +2307,11 @@
  "sanctuary.shaders.sunshafts": "Sunshafts",
  "sanctuary.shaders.sunshafts_help": "Light beams through openings in the scenery. Independent of bloom; range follows shadows (up to 64 blocks).",
  "sanctuary.shaders.sunshaft_intensity": "Sunshaft intensity",
-  "sanctuary.shaders.sunshaft_intensity_help": "Strength of light scattered in the air. Zero disables the effect.",
-  "sanctuary.shaders.sunshaft_intensity_value": "Sunshafts: %s %%"
+  "sanctuary.shaders.sunshaft_intensity_help": "Strength of light scattered in the air. Beams automatically thicken with fog and precipitation. Zero disables the effect.",
+  "sanctuary.shaders.sunshaft_intensity_value": "Sunshafts: %s %%",
+  "sanctuary.shaders.colored_lights": "Colored lights",
+  "sanctuary.shaders.colored_lights_help": "Light-emitting blocks tint their surroundings, even off screen. Local propagation respects obstacles and does not change gameplay light levels.",
+  "sanctuary.shaders.colored_light_intensity": "Colored light intensity",
+  "sanctuary.shaders.colored_light_intensity_value": "Colored lights: %s %%",
+  "sanctuary.shaders.colored_light_intensity_help": "Subtle tint at 35%. Zero disables the calculation. Source changes update progressively."
 }
@@ -2307,6 +2307,11 @@
  "sanctuary.shaders.sunshafts": "Rayons solaires",
  "sanctuary.shaders.sunshafts_help": "Faisceaux de lumière dans les ouvertures du décor. Indépendants du bloom, portée liée aux ombres (64 blocs maximum).",
  "sanctuary.shaders.sunshaft_intensity": "Intensité des rayons",
-  "sanctuary.shaders.sunshaft_intensity_help": "Force de la lumière dans l’air. Zéro désactive le calcul.",
-  "sanctuary.shaders.sunshaft_intensity_value": "Rayons : %s %%"
+  "sanctuary.shaders.sunshaft_intensity_help": "Force de la lumière dans l’air. Les rayons s’épaississent automatiquement avec le brouillard et les précipitations. Zéro désactive le calcul.",
+  "sanctuary.shaders.sunshaft_intensity_value": "Rayons : %s %%",
+  "sanctuary.shaders.colored_lights": "Lumières colorées",
+  "sanctuary.shaders.colored_lights_help": "Les blocs lumineux teintent leurs environs, même hors écran. Propagation locale avec obstacles, sans changer les règles de lumière du jeu.",
+  "sanctuary.shaders.colored_light_intensity": "Intensité des lumières colorées",
+  "sanctuary.shaders.colored_light_intensity_value": "Lumières colorées : %s %%",
+  "sanctuary.shaders.colored_light_intensity_help": "Teinte douce à 35 %. Zéro désactive le calcul. Les changements de sources sont actualisés progressivement."
 }
@@ -0,0 +1,61 @@
+#version 330
+#extension GL_ARB_separate_shader_objects : require
+uniform sampler2D WorldDepth;
+uniform sampler2D SceneColor;
+uniform sampler2D LightVolume;
+layout(std140) uniform ColoredLightScene {
+    mat4 InverseViewProjection;
+    vec4 CameraStrength;
+    vec4 ClipSkyFog;
+    vec4 FogDistance;
+    vec4 VolumeSize;
+};
+layout(location=0) in vec2 texCoord;
+layout(location=0) out vec4 fragColor;
+vec3 positionAt(vec2 uv,float depth){
+    vec4 p=InverseViewProjection*vec4(uv*2.0-1.0,ClipSkyFog.x>.5?depth:depth*2.0-1.0,1);
+    return p.xyz/p.w;
+}
+vec3 neighbor(vec2 uv,vec3 center){float d=texture(WorldDepth,uv).r;return d>0.0?positionAt(uv,d):center;}
+vec3 normalAt(vec3 p){
+    vec2 pixel=1.0/vec2(textureSize(WorldDepth,0));
+    vec3 l=p-neighbor(texCoord-vec2(pixel.x,0),p),r=neighbor(texCoord+vec2(pixel.x,0),p)-p;
+    vec3 d=p-neighbor(texCoord-vec2(0,pixel.y),p),u=neighbor(texCoord+vec2(0,pixel.y),p)-p;
+    vec3 dx=dot(l,l)>0.0&&(dot(l,l)<dot(r,r)||dot(r,r)==0.0)?l:r;
+    vec3 dy=dot(d,d)>0.0&&(dot(d,d)<dot(u,u)||dot(u,u)==0.0)?d:u;
+    float xx=dot(dx,dx),yy=dot(dy,dy);if(xx<1e-20||yy<1e-20)return vec3(0);
+    vec3 n=cross(dx*inversesqrt(xx),dy*inversesqrt(yy));float nn=dot(n,n);if(nn<1e-12)return vec3(0);
+    n*=inversesqrt(nn);return dot(n,-p)<0.0?-n:n;
+}
+vec4 cell(ivec3 p){
+    p=clamp(p,ivec3(0),ivec3(63));
+    vec4 v=texelFetch(LightVolume,ivec2(p.x+(p.y%8)*64,p.z+(p.y/8)*64),0);
+    // Decode Q4.4 logarithmic RGB. Black stays exactly black.
+    v.rgb=max(vec3(0),(pow(vec3(.8),vec3(15)-v.rgb*(255.0/16.0))-vec3(pow(.8,15.0)))/(1.0-pow(.8,15.0)));
+    return v;
+}
+vec4 field(vec3 p){
+    vec3 at=p-.5;ivec3 base=ivec3(floor(at));vec3 f=fract(at);vec4 result=vec4(0);
+    for(int y=0;y<2;y++)for(int z=0;z<2;z++)for(int x=0;x<2;x++){
+        float w=(x==0?1.0-f.x:f.x)*(y==0?1.0-f.y:f.y)*(z==0?1.0-f.z:f.z);
+        result+=cell(base+ivec3(x,y,z))*w;
+    }
+    return result;
+}
+void main(){
+    vec3 scene=texture(SceneColor,texCoord).rgb;fragColor=vec4(scene,0);
+    float depth=texture(WorldDepth,texCoord).r;if(depth<=0.0)return;
+    vec3 p=positionAt(texCoord,depth),n=normalAt(p);if(dot(n,n)<.5)return;
+    vec3 a=abs(n);float axis=max(a.x,max(a.y,a.z));
+    // Sample outside opaque block faces. Bilinear atlas filtering would leak
+    // across unrelated slices, so the eight neighbours are explicitly addressed.
+    vec3 local=p+CameraStrength.xyz+n*(axis>.995?.51:.06);
+    vec3 edge=min(local,vec3(VolumeSize.x)-local);
+    float border=smoothstep(VolumeSize.y,VolumeSize.y+VolumeSize.z,min(edge.x,min(edge.y,edge.z)));if(border<=0.0)return;
+    vec4 light=field(local);float energy=max(light.r,max(light.g,light.b));if(energy<.0001)return;
+    float luminance=dot(light.rgb,vec3(.2126,.7152,.0722));
+    vec3 tint=clamp(light.rgb/max(luminance,.0001),vec3(.15),vec3(2));
+    float fog=max(clamp((max(length(p.xz),abs(p.y))-FogDistance.x)/max(.001,FogDistance.y-FogDistance.x),0,1),clamp((length(p)-FogDistance.z)/max(.001,FogDistance.w-FogDistance.z),0,1));
+    float strength=CameraStrength.w*.8*sqrt(energy)*border*(1.0-.8*light.a*ClipSkyFog.y)*(1.0-fog*ClipSkyFog.z);
+    fragColor=vec4(scene*mix(vec3(1),tint,strength),0);
+}
@@ -33,12 +33,15 @@ void main(){
        float span=max(0.0,stop-start);if(span<=0.0)break;
        float t=(start+stop)*.5;
        float distanceFade=1.0-smoothstep(range*.7,range,t);
-        total+=sunlight(ray*t)*span*exp(-t/24.0)*distanceFade;
+        total+=sunlight(ray*t)*span*exp(-t/24.0*ShaftAtmosphere.z)*distanceFade;
    }
-    float phase=.12+.88*pow(max(0.0,dot(ray,SunStrength.xyz)),4.0);
-    float weather=clamp(SunStrength.w/.38,0.0,1.0);
+    // Thick air scatters into wider viewing angles, while extinguishing distant light.
+    // Keep the shadow footprint unchanged: weather cannot open a hole in a solid wall.
+    float base=mix(.12,.30,ShaftAtmosphere.y);
+    float phase=base+(1.0-base)*pow(max(0.0,dot(ray,SunStrength.xyz)),mix(4.0,2.0,ShaftAtmosphere.y));
+    float weather=ShaftAtmosphere.w;
    float fogDistance=max(abs(ray.x),max(abs(ray.y),abs(ray.z)))*end;
    float nativeFog=1.0-smoothstep(DistanceClipFog.z,max(DistanceClipFog.z+.01,DistanceClipFog.w),fogDistance);
-    float amount=total*.018*phase*weather*ShaftSettings.x*nativeFog;
+    float amount=total*.018*phase*weather*ShaftSettings.x*nativeFog*ShaftAtmosphere.x;
    fragColor=vec4(ShaftColor.rgb*amount,end);
 }
@@ -6,7 +6,10 @@ layout(std140) uniform PixelShadows {
    vec4 DistanceClipFog;
    vec4 EnvironmentFog;
 };
-layout(std140) uniform ShaftParams { vec4 ShaftColor; vec4 ShaftSettings; };
+layout(std140) uniform ShaftParams {
+    vec4 ShaftColor; vec4 ShaftSettings;
+    vec4 ShaftAtmosphere; // density, angular diffusion, extinction, available daylight
+};
 uniform sampler2D WorldDepth;
 vec2 shaftTexel(vec2 uv){
    vec2 size=vec2(textureSize(WorldDepth,0));
@@ -1,6 +1,6 @@
 name = "Sanctuary"
 author = "KOKA99CAB"
-version = "beta.137"
+version = "beta.139"
 pack-format = "packwiz:1.1.0"

 [index]
Author	SHA1	Message	Date
koka	dc33ffa546	Add optional local colored lights for beta.139 Build Sanctuary / build (push) Canceled after 0s Details	2026-09-18 02:25:48 +02:00
koka	9d84a02ed9	Verify Sanctuary shaders on Vulkan with explicit backend tests Build Sanctuary / build (push) Canceled after 0s Details	2026-09-18 01:59:13 +02:00
koka	91181865d5	Record beta.138 release and preserved Prism state Build Sanctuary / build (push) Canceled after 0s Details	2026-09-18 01:25:31 +02:00
koka	daf36fdeac	Adapt solar volume density to weather for beta.138 Build Sanctuary / build (push) Canceled after 0s Details	2026-09-18 01:24:13 +02:00
koka	7f576d14d9	Record beta.137 release and verified Prism update Build Sanctuary / build (push) Canceled after 0s Details	2026-09-18 01:01:59 +02:00