diff --git a/CHANGELOG.md b/CHANGELOG.md
index 4e3a1b6..a2d2031 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -6,6 +6,14 @@ Ce journal suit les **versions du modpack**. Lorsqu'un seul module change, sa ve
 - Depuis `26.2.0-alpha.6`, le pack et les modules ont des versions indépendantes. I Like To Move It et Only Fun deviennent les cinquième et sixième modules actifs dans l'alpha 46.
 - Les versions ci-dessous ont été reconstituées à partir des JAR archivés, des packs locaux et du code source actuel. Les dates n'étant pas enregistrées de manière fiable, elles ne sont pas inventées.
 
+## Non publié
+
+Module modifié : **Sanctuary `0.0.0-alpha.137`**.
+
+- garantit sur chaque niveau de la Backroom un coffre par cellule de 3 × 3 chunks dans les nouveaux chunks, au lieu d’un coffre aléatoire réparti entre les cinq niveaux ;
+- resserre aussi la grille des lits de sortie de 10 × 10 à 3 × 3 chunks sur chacun des cinq niveaux afin qu’ils soient réellement trouvables ;
+- ne change ni le butin ordinaire des coffres, ni les données Sanctuary v15, ni le protocole réseau 24 ; les nouveaux coffres et lits apparaissent dans les chunks qui n’ont pas encore été générés.
+
 ## `26.2.0-alpha.230`
 
 Modules modifiés : **Sanctuary `0.0.0-alpha.136`** et **Red-Stoner `0.0.0-alpha.17`**.
diff --git a/build.gradle b/build.gradle
index 3057119..16d5873 100644
--- a/build.gradle
+++ b/build.gradle
@@ -2916,7 +2916,7 @@ tasks.register("verifyNotchEncounter") {
 		def textureHash = MessageDigest.getInstance("SHA-256").digest(texture.bytes).encodeHex().toString()
 		if (rootProject.itsalive_version != "0.0.0-alpha.38"
 			|| rootProject.ouch_version != "0.0.0-alpha.11"
-			|| rootProject.sanctuary_version != "0.0.0-alpha.136"
+			|| rootProject.sanctuary_version != "0.0.0-alpha.137"
 			|| rootProject.masterkey_version != "0.0.0-alpha.9"
 			|| rootProject.pack_version != "26.2.0-alpha.230"
 			|| manifests.itsalive.custom?.sanctuary26?.data_version != 4
@@ -3010,7 +3010,7 @@ tasks.register("verifyMagicCarpet") {
 		if (rootProject.pack_version != "26.2.0-alpha.230"
 			|| rootProject.iliketomoveit_version != "0.0.0-alpha.18"
 			|| rootProject.onlyfun_version != "0.0.0-alpha.27"
-			|| rootProject.sanctuary_version != "0.0.0-alpha.136"
+			|| rootProject.sanctuary_version != "0.0.0-alpha.137"
 			|| manifests.iliketomoveit.custom?.sanctuary26?.data_version != 4
 			|| manifests.iliketomoveit.custom?.sanctuary26?.network_protocol != 5
 			|| manifests.iliketomoveit.depends?.sanctuary != ">=0.0.0-alpha.127"
@@ -3641,7 +3641,7 @@ tasks.register("verifyProgressivePauseMenuRelease") {
 				"sanctuary/src/main/resources/assets/sanctuary/lang/${locale}.json"))]
 		}
 		if (rootProject.pack_version != "26.2.0-alpha.230"
-			|| rootProject.sanctuary_version != "0.0.0-alpha.136"
+			|| rootProject.sanctuary_version != "0.0.0-alpha.137"
 			|| rootProject.onlyfun_version != "0.0.0-alpha.27"
 			|| release.pack_version != rootProject.pack_version || index.versionId != rootProject.pack_version
 			|| migration.source?.modules != [sanctuary: "0.0.0-alpha.108", onlyfun: "0.0.0-alpha.17"]
@@ -4240,7 +4240,7 @@ project(":redstoner") {
 					"sanctuary/src/main/resources/assets/sanctuary/lang/${it}.json"))
 			}
 			if (rootProject.redstoner_version != "0.0.0-alpha.17"
-				|| rootProject.sanctuary_version != "0.0.0-alpha.136"
+				|| rootProject.sanctuary_version != "0.0.0-alpha.137"
 				|| redstonerManifest.custom?.sanctuary26?.data_version != 4
 				|| redstonerManifest.custom?.sanctuary26?.network_protocol != 7
 				|| sanctuaryManifest.custom?.sanctuary26?.data_version != 15
@@ -4576,7 +4576,7 @@ tasks.register("verifyShopPricingLayoutRelease") {
 		def index = new JsonSlurper().parse(file("pack/prism/modrinth.index.json"))
 		if (rootProject.pack_version != "26.2.0-alpha.230"
 			|| rootProject.onlyfun_version != "0.0.0-alpha.27"
-			|| rootProject.sanctuary_version != "0.0.0-alpha.136"
+			|| rootProject.sanctuary_version != "0.0.0-alpha.137"
 			|| release.pack_version != rootProject.pack_version || index.versionId != rootProject.pack_version
 			|| migration.source?.pack_version != "26.2.0-alpha.192"
 			|| migration.target?.pack_version != "26.2.0-alpha.193"
@@ -4670,7 +4670,7 @@ tasks.register("verifyShopCsvBossGatesRelease") {
 		def offerCatalog = file("sanctuary/src/main/java/fr/koka99cab/sanctuary26/sanctuary/shop/ShopOfferCatalog.java").text
 		if (rootProject.pack_version != "26.2.0-alpha.230"
 			|| rootProject.onlyfun_version != "0.0.0-alpha.27"
-			|| rootProject.sanctuary_version != "0.0.0-alpha.136"
+			|| rootProject.sanctuary_version != "0.0.0-alpha.137"
 			|| release.pack_version != rootProject.pack_version || index.versionId != rootProject.pack_version
 			|| migration.source?.pack_version != "26.2.0-alpha.194"
 			|| migration.source?.modules != [onlyfun: "0.0.0-alpha.18", sanctuary: "0.0.0-alpha.110"]
@@ -4763,7 +4763,7 @@ tasks.register("verifyQuestRequestsCauldronBatchesRelease") {
 		def sanctuaryManifest = new JsonSlurper().parse(file("sanctuary/src/main/resources/fabric.mod.json"))
 		if (rootProject.pack_version != "26.2.0-alpha.230"
 			|| rootProject.itsalive_version != "0.0.0-alpha.38"
-			|| rootProject.sanctuary_version != "0.0.0-alpha.136"
+			|| rootProject.sanctuary_version != "0.0.0-alpha.137"
 			|| migration.source?.pack_version != "26.2.0-alpha.196"
 			|| migration.target?.pack_version != "26.2.0-alpha.197"
 			|| migration.target?.modules != [itsalive: "0.0.0-alpha.29", sanctuary: "0.0.0-alpha.113"]
@@ -4863,7 +4863,7 @@ tasks.register("verifyQuestRequestContractsRelease") {
 		def sanctuaryManifest = new JsonSlurper().parse(file("sanctuary/src/main/resources/fabric.mod.json"))
 		if (rootProject.pack_version != "26.2.0-alpha.230"
 			|| rootProject.itsalive_version != "0.0.0-alpha.38"
-			|| rootProject.sanctuary_version != "0.0.0-alpha.136"
+			|| rootProject.sanctuary_version != "0.0.0-alpha.137"
 			|| migration.source?.pack_version != "26.2.0-alpha.198"
 			|| migration.source?.modules?.sanctuary != "0.0.0-alpha.114"
 			|| migration.target?.pack_version != "26.2.0-alpha.199"
@@ -4983,7 +4983,7 @@ tasks.register("verifyQuestRequestEscrowRelease") {
 		def packwizIndex = file("pack/packwiz/index.toml").text
 		def sanctuaryManifest = new JsonSlurper().parse(file("sanctuary/src/main/resources/fabric.mod.json"))
 		if (rootProject.pack_version != "26.2.0-alpha.230"
-			|| rootProject.sanctuary_version != "0.0.0-alpha.136"
+			|| rootProject.sanctuary_version != "0.0.0-alpha.137"
 			|| migration.source?.pack_version != "26.2.0-alpha.200"
 			|| migration.source?.modules?.sanctuary != "0.0.0-alpha.115"
 			|| migration.target?.pack_version != "26.2.0-alpha.201"
@@ -5040,7 +5040,7 @@ tasks.register("verifyWaystoneShopCulinaryAlpha202Release") {
 			|| rootProject.anotherworld_version != "0.0.0-alpha.57"
 			|| rootProject.itsalive_version != "0.0.0-alpha.38"
 			|| rootProject.iliketomoveit_version != "0.0.0-alpha.18"
-			|| rootProject.sanctuary_version != "0.0.0-alpha.136"
+			|| rootProject.sanctuary_version != "0.0.0-alpha.137"
 			|| migration.source?.pack_version != "26.2.0-alpha.201"
 			|| migration.source?.modules != [
 				itsalive: "0.0.0-alpha.30",
@@ -5198,7 +5198,7 @@ tasks.register("verifySafeVaultFeature") {
 		}.keySet()
 		if (rootProject.pack_version != "26.2.0-alpha.230"
 			|| rootProject.anotherworld_version != "0.0.0-alpha.57"
-			|| rootProject.sanctuary_version != "0.0.0-alpha.136"
+			|| rootProject.sanctuary_version != "0.0.0-alpha.137"
 			|| migration.schema_version != 1
 			|| migration.source?.pack_version != "26.2.0-alpha.201"
 			|| migration.target?.pack_version != "26.2.0-alpha.202"
@@ -6058,7 +6058,7 @@ tasks.register("verifyAlpha210Release") {
 			it.path == "mods/jei-26.2-fabric-30.29.0.199.jar"
 		}
 		if (rootProject.pack_version != "26.2.0-alpha.230"
-			|| rootProject.sanctuary_version != "0.0.0-alpha.136"
+			|| rootProject.sanctuary_version != "0.0.0-alpha.137"
 			|| rootProject.onlyfun_version != "0.0.0-alpha.27"
 			|| rootProject.iliketomoveit_version != "0.0.0-alpha.18"
 			|| rootProject.itsalive_version != "0.0.0-alpha.38"
@@ -6160,7 +6160,7 @@ tasks.register("verifyAlpha211Release") {
 			itsalive: "0.0.0-alpha.38",
 			ouch: "0.0.0-alpha.11",
 			masterkey: "0.0.0-alpha.9"]
-		def workspaceModules = currentModules + [sanctuary: "0.0.0-alpha.136"]
+		def workspaceModules = currentModules + [sanctuary: "0.0.0-alpha.137"]
 		def expectedDataVersions = [ambiance: 2, itsalive: 3, onlyfun: 2, ouch: 1, sanctuary: 11]
 		def workspaceDataVersions = [ambiance: 2, itsalive: 4, onlyfun: 2, ouch: 1, sanctuary: 15]
 		def expectedProtocols = [ambiance: 6, itsalive: 4, onlyfun: 3, ouch: 1, sanctuary: 22]
@@ -6260,7 +6260,7 @@ tasks.register("verifyAlpha212Release") {
 			it.path == "mods/jei-26.2-fabric-30.29.0.199.jar"
 		}
 		if (rootProject.pack_version != "26.2.0-alpha.230"
-			|| rootProject.sanctuary_version != "0.0.0-alpha.136"
+			|| rootProject.sanctuary_version != "0.0.0-alpha.137"
 			|| migration.source?.pack_version != "26.2.0-alpha.211"
 			|| migration.source?.modules != [sanctuary: "0.0.0-alpha.119"]
 			|| migration.target?.pack_version != "26.2.0-alpha.212"
@@ -6759,7 +6759,7 @@ tasks.register("verifyAlpha218Release") {
 			}
 			|| rootProject.onlyfun_version != "0.0.0-alpha.27"
 			|| rootProject.iliketomoveit_version != "0.0.0-alpha.18"
-			|| rootProject.sanctuary_version != "0.0.0-alpha.136"
+			|| rootProject.sanctuary_version != "0.0.0-alpha.137"
 			|| migration.source?.pack_version != "26.2.0-alpha.217"
 			|| migration.source?.modules != sourceModules
 			|| migration.target?.pack_version != "26.2.0-alpha.218"
@@ -6845,7 +6845,7 @@ tasks.register("verifyAlpha219Release") {
 			ambiance: "0.0.0-alpha.22", sanctuary: "0.0.0-alpha.136",
 			iliketomoveit: "0.0.0-alpha.18", onlyfun: "0.0.0-alpha.27",
 			itsalive: "0.0.0-alpha.38", ouch: "0.0.0-alpha.11", masterkey: "0.0.0-alpha.9"]
-		def workspaceModules = currentModules + [sanctuary: "0.0.0-alpha.136"]
+		def workspaceModules = currentModules + [sanctuary: "0.0.0-alpha.137"]
 		def requiredJars = currentModules.collect { id, version ->
 			"file = \"mods/${id}-${version}.jar\""
 		}
@@ -7170,7 +7170,7 @@ tasks.register("verifyAlpha222Release") {
 		}
 		if (rootProject.pack_version != "26.2.0-alpha.230"
 			|| rootProject.redstoner_version != "0.0.0-alpha.17"
-			|| rootProject.sanctuary_version != "0.0.0-alpha.136"
+			|| rootProject.sanctuary_version != "0.0.0-alpha.137"
 			|| migration.source?.pack_version != "26.2.0-alpha.221"
 			|| migration.source?.modules != [
 				redstoner: "0.0.0-alpha.12", sanctuary: "0.0.0-alpha.122"]
@@ -7382,7 +7382,7 @@ tasks.register("verifyAlpha223Release") {
 			it.path == "mods/jei-26.2-fabric-30.29.0.199.jar"
 		}
 		if (rootProject.pack_version != "26.2.0-alpha.230"
-			|| rootProject.sanctuary_version != "0.0.0-alpha.136"
+			|| rootProject.sanctuary_version != "0.0.0-alpha.137"
 			|| migration.source?.pack_version != "26.2.0-alpha.222"
 			|| migration.source?.modules != [sanctuary: "0.0.0-alpha.124"]
 			|| migration.target?.pack_version != "26.2.0-alpha.223"
@@ -7503,7 +7503,7 @@ tasks.register("verifyAlpha224Release") {
 		def currentModules = targetModules + [
 			itsalive: "0.0.0-alpha.38", iliketomoveit: "0.0.0-alpha.18",
 			onlyfun: "0.0.0-alpha.27", sanctuary: "0.0.0-alpha.136"]
-		def workspaceModules = currentModules + [sanctuary: "0.0.0-alpha.136"]
+		def workspaceModules = currentModules + [sanctuary: "0.0.0-alpha.137"]
 		def inventorySort = file(
 			"sanctuary/src/main/java/fr/koka99cab/sanctuary26/sanctuary/gameplay/SanctuaryInventorySort.java").text
 		def clientProgress = file(
@@ -7625,11 +7625,11 @@ tasks.register("verifyAlpha225Release") {
 			sanctuary: "0.0.0-alpha.129"]
 		def currentModules = targetModules + [sanctuary: "0.0.0-alpha.136"]
 		def currentWorkspaceModules = currentModules + [
-			anotherworld: "0.0.0-alpha.57", sanctuary: "0.0.0-alpha.136"]
+			anotherworld: "0.0.0-alpha.57", sanctuary: "0.0.0-alpha.137"]
 		def workspaceModules = moduleIds.collectEntries { id ->
 			[(id): project(":${id}").version.toString()]
 		}
-		def releasedModules = workspaceModules
+		def releasedModules = workspaceModules + [sanctuary: "0.0.0-alpha.136"]
 		def requiredJars = releasedModules.collect { id, version ->
 			"file = \"mods/${id}-${version}.jar\""
 		}
@@ -7789,12 +7789,12 @@ tasks.register("verifyAlpha226Release") {
 		def workspaceModules = moduleIds.collectEntries { id ->
 			[(id): project(":${id}").version.toString()]
 		}
-		def releasedModules = workspaceModules
+		def releasedModules = workspaceModules + [sanctuary: "0.0.0-alpha.136"]
 		def requiredJars = releasedModules.collect { id, version ->
 			"file = \"mods/${id}-${version}.jar\""
 		}
 		if (rootProject.pack_version != "26.2.0-alpha.230"
-			|| rootProject.sanctuary_version != "0.0.0-alpha.136"
+			|| rootProject.sanctuary_version != "0.0.0-alpha.137"
 			|| migration.status != "released"
 			|| migration.source?.pack_version != "26.2.0-alpha.225"
 			|| migration.source?.modules != [sanctuary: "0.0.0-alpha.129"]
@@ -7880,13 +7880,13 @@ tasks.register("verifyAlpha227Release") {
 		def workspaceModules = moduleIds.collectEntries { id ->
 			[(id): project(":${id}").version.toString()]
 		}
-		def releasedModules = workspaceModules
+		def releasedModules = workspaceModules + [sanctuary: "0.0.0-alpha.136"]
 		def requiredJars = releasedModules.collect { id, version ->
 			"file = \"mods/${id}-${version}.jar\""
 		}
 		if (rootProject.pack_version != "26.2.0-alpha.230"
 			|| rootProject.anotherworld_version != "0.0.0-alpha.57"
-			|| rootProject.sanctuary_version != "0.0.0-alpha.136"
+			|| rootProject.sanctuary_version != "0.0.0-alpha.137"
 			|| migration.status != "released"
 			|| migration.source?.pack_version != "26.2.0-alpha.226"
 			|| migration.source?.modules != [
@@ -7978,13 +7978,13 @@ tasks.register("verifyAlpha228Release") {
 		def workspaceModules = moduleIds.collectEntries { id ->
 			[(id): project(":${id}").version.toString()]
 		}
-		def releasedModules = workspaceModules
+		def releasedModules = workspaceModules + [sanctuary: "0.0.0-alpha.136"]
 		def requiredJars = releasedModules.collect { id, version ->
 			"file = \"mods/${id}-${version}.jar\""
 		}
 		if (rootProject.pack_version != "26.2.0-alpha.230"
 			|| rootProject.redstoner_version != "0.0.0-alpha.17"
-			|| rootProject.sanctuary_version != "0.0.0-alpha.136"
+			|| rootProject.sanctuary_version != "0.0.0-alpha.137"
 			|| migration.status != "released"
 			|| migration.source?.pack_version != "26.2.0-alpha.227"
 			|| migration.source?.modules != [
@@ -8083,7 +8083,7 @@ tasks.register("verifyAlpha229Release") {
 		def workspaceModules = moduleIds.collectEntries { id ->
 			[(id): project(":${id}").version.toString()]
 		}
-		def releasedModules = workspaceModules
+		def releasedModules = workspaceModules + [sanctuary: "0.0.0-alpha.136"]
 		def requiredJars = releasedModules.collect { id, version ->
 			"file = \"mods/${id}-${version}.jar\""
 		}
@@ -8094,7 +8094,7 @@ tasks.register("verifyAlpha229Release") {
 			"screen.redstoner.storage_terminal.sort.count_descending"]
 		if (rootProject.pack_version != "26.2.0-alpha.230"
 			|| rootProject.redstoner_version != "0.0.0-alpha.17"
-			|| rootProject.sanctuary_version != "0.0.0-alpha.136"
+			|| rootProject.sanctuary_version != "0.0.0-alpha.137"
 			|| migration.status != "released"
 			|| migration.source?.pack_version != "26.2.0-alpha.228"
 			|| migration.source?.modules != [redstoner: "0.0.0-alpha.15"]
@@ -8171,13 +8171,14 @@ tasks.register("verifyAlpha230Release") {
 		def workspaceModules = moduleIds.collectEntries { id ->
 			[(id): project(":${id}").version.toString()]
 		}
-		def requiredJars = workspaceModules.collect { id, version ->
+		def releasedModules = workspaceModules + [sanctuary: "0.0.0-alpha.136"]
+		def requiredJars = releasedModules.collect { id, version ->
 			"file = \"mods/${id}-${version}.jar\""
 		}
 		def indexHash = java.security.MessageDigest.getInstance("SHA-256")
 			.digest(packwizIndexFile.bytes).encodeHex().toString()
 		if (rootProject.pack_version != "26.2.0-alpha.230"
-			|| rootProject.sanctuary_version != "0.0.0-alpha.136"
+			|| rootProject.sanctuary_version != "0.0.0-alpha.137"
 			|| rootProject.redstoner_version != "0.0.0-alpha.17"
 			|| migration.schema_version != 1
 			|| migration.status != "released"
diff --git a/gradle.properties b/gradle.properties
index da42b38..213cc74 100644
--- a/gradle.properties
+++ b/gradle.properties
@@ -28,7 +28,7 @@ iliketomoveit_version=0.0.0-alpha.18
 iliketomoveit_lifecycle=active
 onlyfun_version=0.0.0-alpha.27
 onlyfun_lifecycle=active
-sanctuary_version=0.0.0-alpha.136
+sanctuary_version=0.0.0-alpha.137
 sanctuary_lifecycle=active
 pack_version=26.2.0-alpha.230
 maven_group=fr.koka99cab.sanctuary26
diff --git a/sanctuary/BACKROOM.md b/sanctuary/BACKROOM.md
index f1707f5..ce0e00e 100644
--- a/sanctuary/BACKROOM.md
+++ b/sanctuary/BACKROOM.md
@@ -35,6 +35,7 @@ réelle matérialisée reçoit un identifiant persistant : elle peut passer du r
 Une perte associée à un joueur lui reste réservée pendant 24 000 ticks avant de pouvoir rejoindre
 les tirages historiques partagés ; une perte sans propriétaire est immédiatement partagée.
 
+Chaque niveau génère exactement un coffre par cellule de 3 × 3 chunks dans les nouveaux chunks.
 Tous les coffres vanilla de la Backroom, générés ou posés, deviennent des nœuds de butin renouvelés
 toutes les 12 000 ticks lors de leur prochaine ouverture. Le renouvellement rend au registre les
 objets perdus non pris, efface le contenu ordinaire et produit le plus souvent du vide ou des
@@ -75,9 +76,9 @@ numérotés de haut en bas afin qu’une chute fasse toujours avancer vers le ni
 Les ouvertures entre deux niveaux sont calculées une seule fois puis appliquées à la fois au sol
 supérieur et au plafond inférieur : une chute annoncée ne débouche donc pas sur un bloc fermé. Les
 imperfections, morceaux suspendus et raccords volontairement cassés font partie de l’esthétique,
-mais les portes des couloirs restent traversables. Les lits de sortie restent rares, mais chacun
-des cinq niveaux en génère exactement un par cellule de 10 × 10 chunks, sur un plancher praticable
-propre à sa zone. Il n’est donc plus nécessaire de remonter jusqu’aux Archives pour ressortir.
+mais les portes des couloirs restent traversables. Chacun des cinq niveaux génère exactement un lit
+de sortie par cellule de 3 × 3 chunks, sur un plancher praticable propre à sa zone. Il n’est donc
+plus nécessaire de parcourir une centaine de chunks ou de remonter jusqu’aux Archives pour ressortir.
 
 La Backroom ne possède ni ciel, ni soleil, ni lune, ni étoiles, ni lumière ambiante. Son biome ne
 déclare aucune créature et le serveur retire aussi toute entité de catégorie monstre qui y serait
diff --git a/sanctuary/build.gradle b/sanctuary/build.gradle
index 24be63c..3f08846 100644
--- a/sanctuary/build.gradle
+++ b/sanctuary/build.gradle
@@ -207,7 +207,7 @@ tasks.register("verifyBlackMarket") {
 		def questData = file("src/main/java/fr/koka99cab/sanctuary26/sanctuary/shop/QuestBoardData.java").text
 		def quests = file("src/main/java/fr/koka99cab/sanctuary26/sanctuary/shop/QuestBoardService.java").text
 		def inventoryView = file("src/main/java/fr/koka99cab/sanctuary26/sanctuary/api/inventory/SanctuaryPlayerInventoryView.java").text
-		if (project.version.toString() != "0.0.0-alpha.136"
+		if (project.version.toString() != "0.0.0-alpha.137"
 			|| !data.contains('SAVE_KEY = "black_market"') || !data.contains("DATA_VERSION = 2")
 			|| !data.contains("ItemStack.CODEC.fieldOf(\"item\")") || !data.contains("replaceListing")
 			|| !service.contains("LISTING_FEE_RUBIES = 1") || !service.contains("COMMISSION_PERCENT = 5")
@@ -2923,7 +2923,7 @@ tasks.register("verifyShopCurrencyRowsRelease") {
 			"src/main/java/fr/koka99cab/sanctuary26/sanctuary/shop/BlackMarketService.java").text
 		def shop = file(
 			"src/main/java/fr/koka99cab/sanctuary26/sanctuary/shop/ShopService.java").text
-		if (project.version.toString() != "0.0.0-alpha.136"
+		if (project.version.toString() != "0.0.0-alpha.137"
 			|| migration.target?.modules?.sanctuary != "0.0.0-alpha.117"
 			|| migration.shop_currency_inventory?.all_unlocked_rows_counted != true
 			|| migration.shop_currency_inventory?.overflow_rows_counted != true
@@ -3089,7 +3089,7 @@ tasks.register("verifyProgressivePauseMenu") {
 			"pack/migrations/26.2.0-alpha.190-progressive-pause-menu-to-alpha.191.json"))
 		def pauseMenu = file("src/main/java/fr/koka99cab/sanctuary26/sanctuary/mixin/client/PauseScreenMixin.java").text
 		def costs = file("src/main/java/fr/koka99cab/sanctuary26/sanctuary/progression/SanctuaryProgressionCosts.java").text
-		if (project.version.toString() != "0.0.0-alpha.136"
+		if (project.version.toString() != "0.0.0-alpha.137"
 			|| migration.target?.pack_version != "26.2.0-alpha.191"
 			|| migration.target?.modules?.sanctuary != "0.0.0-alpha.109"
 			|| migration.pause_menu?.progression_full_width != true
@@ -3127,7 +3127,7 @@ tasks.register("verifyShopPricingLayout") {
 			"pack/migrations/26.2.0-alpha.192-shop-pricing-layout-to-alpha.193.json"))
 		def screen = file("src/main/java/fr/koka99cab/sanctuary26/sanctuary/client/SanctuaryShopScreen.java").text
 		def progression = file("src/main/java/fr/koka99cab/sanctuary26/sanctuary/shop/ShopProgression.java").text
-		if (project.version.toString() != "0.0.0-alpha.136"
+		if (project.version.toString() != "0.0.0-alpha.137"
 			|| migration.target?.modules?.sanctuary != "0.0.0-alpha.110"
 			|| migration.shop_layout?.locked_offer_buttons != 6
 			|| migration.shop_layout?.button_slots != [4, 5, 6, 7, 8, 9]
@@ -3158,7 +3158,7 @@ tasks.register("verifyShopCsvBossGates") {
 			"pack/migrations/26.2.0-alpha.194-shop-csv-boss-gates-to-alpha.195.json"))
 		def provider = file("src/main/java/fr/koka99cab/sanctuary26/sanctuary/shop/ShopCatalogProvider.java").text
 		def catalog = file("src/main/java/fr/koka99cab/sanctuary26/sanctuary/shop/ShopOfferCatalog.java").text
-		if (project.version.toString() != "0.0.0-alpha.136"
+		if (project.version.toString() != "0.0.0-alpha.137"
 			|| migration.target?.pack_version != "26.2.0-alpha.195"
 			|| migration.target?.modules?.sanctuary != "0.0.0-alpha.111"
 			|| migration.compatibility?.sanctuary_data_version != 11
@@ -3189,7 +3189,7 @@ tasks.register("verifyDeliveryBoxOrientation") {
 		def blockstate = new JsonSlurper().parse(
 			file("src/main/resources/assets/sanctuary/blockstates/delivery_box.json"))
 		def expectedVariants = ["facing=north", "facing=east", "facing=south", "facing=west"].toSet()
-		if (project.version.toString() != "0.0.0-alpha.136"
+		if (project.version.toString() != "0.0.0-alpha.137"
 			|| migration.target?.modules?.sanctuary != "0.0.0-alpha.112"
 			|| migration.mailbox?.id != "sanctuary:delivery_box"
 			|| migration.mailbox?.horizontal_facing != true
@@ -3217,7 +3217,7 @@ tasks.register("verifyInventoryShiftClick") {
 		def mixin = file("src/main/java/fr/koka99cab/sanctuary26/sanctuary/mixin/AbstractContainerMenuMixin.java").text
 		def screen = file("src/main/java/fr/koka99cab/sanctuary26/sanctuary/mixin/client/AbstractContainerScreenMixin.java").text
 		def gui = file("INVENTORY_GUI.md").text
-		if (project.version.toString() != "0.0.0-alpha.136"
+		if (project.version.toString() != "0.0.0-alpha.137"
 			|| !transfer.contains("shouldAppendOverflow")
 			|| !transfer.contains("isVanillaStorageRange")
 			|| !transfer.contains("hotbarStart")
@@ -3263,7 +3263,7 @@ tasks.register("verifyQuestRequests") {
 			new JsonSlurper().parse(file("src/main/resources/data/sanctuary/loot_table/blocks/${path}.json"))
 				.pools[0].entries[0].name
 		}
-		if (project.version.toString() != "0.0.0-alpha.136"
+		if (project.version.toString() != "0.0.0-alpha.137"
 			|| migration.target?.modules?.sanctuary != "0.0.0-alpha.113"
 			|| migration.quest_requests?.save_key != "quest_requests"
 			|| migration.quest_requests?.data_version != 1
@@ -3325,7 +3325,7 @@ tasks.register("verifyQuestRequestContracts") {
 		def locales = ["fr_fr", "en_us", "ru_ru"].collectEntries { locale ->
 			[(locale): new JsonSlurper().parse(file("src/main/resources/assets/sanctuary/lang/${locale}.json"))]
 		}
-		if (project.version.toString() != "0.0.0-alpha.136"
+		if (project.version.toString() != "0.0.0-alpha.137"
 			|| migration.source?.pack_version != "26.2.0-alpha.198"
 			|| migration.source?.modules?.sanctuary != "0.0.0-alpha.114"
 			|| migration.target?.pack_version != "26.2.0-alpha.199"
@@ -3394,7 +3394,7 @@ tasks.register("verifyQuestRequestEscrow") {
 		def locales = ["fr_fr", "en_us", "ru_ru"].collectEntries { locale ->
 			[(locale): new JsonSlurper().parse(file("src/main/resources/assets/sanctuary/lang/${locale}.json"))]
 		}
-		if (project.version.toString() != "0.0.0-alpha.136"
+		if (project.version.toString() != "0.0.0-alpha.137"
 			|| migration.source?.pack_version != "26.2.0-alpha.200"
 			|| migration.source?.modules?.sanctuary != "0.0.0-alpha.115"
 			|| migration.target?.pack_version != "26.2.0-alpha.201"
@@ -3473,7 +3473,7 @@ tasks.register("verifyCraftableBannerCape") {
 		def locales = ["fr_fr", "en_us", "ru_ru"].collect {
 			new JsonSlurper().parse(file("src/main/resources/assets/sanctuary/lang/${it}.json"))
 		}
-		if (project.version.toString() != "0.0.0-alpha.136"
+		if (project.version.toString() != "0.0.0-alpha.137"
 			|| migration.target?.modules?.sanctuary != "0.0.0-alpha.130"
 			|| migration.white_cape?.crafting_material_count != 6
 			|| migration.white_cape?.maximum_pattern_layers != 6
@@ -3525,7 +3525,7 @@ tasks.register("verifyFinalSanctuaryTickets") {
 		def locales = ["fr_fr", "en_us", "ru_ru"].collect {
 			new JsonSlurper().parse(file("src/main/resources/assets/sanctuary/lang/${it}.json"))
 		}
-		if (project.version.toString() != "0.0.0-alpha.136"
+		if (project.version.toString() != "0.0.0-alpha.137"
 			|| !capeRenderer.contains("SHIELD_PATTERN_X_SCALE = 1.2F")
 			|| !capeRenderer.contains("SHIELD_PATTERN_Y_SCALE = 1.375F")
 			|| !capeRenderer.contains("model, state, false, appearance.baseColor()")
@@ -3574,7 +3574,7 @@ tasks.register("verifyAlphaIndev") {
 		def locales = ["fr_fr", "en_us", "ru_ru"].collect {
 			new JsonSlurper().parse(file("src/main/resources/assets/sanctuary/lang/${it}.json"))
 		}
-		if (project.version.toString() != "0.0.0-alpha.136"
+		if (project.version.toString() != "0.0.0-alpha.137"
 			|| migration.target?.modules?.sanctuary != "0.0.0-alpha.122"
 			|| migration.alpha_world?.dimension != "sanctuary:alpha"
 			|| migration.alpha_world?.legacy_dimension != "portals:alpha"
@@ -3634,7 +3634,7 @@ tasks.register("verifyBackroom") {
 		def locales = ["fr_fr", "en_us", "ru_ru"].collect {
 			new JsonSlurper().parse(file("src/main/resources/assets/sanctuary/lang/${it}.json"))
 		}
-		if (project.version.toString() != "0.0.0-alpha.136"
+		if (project.version.toString() != "0.0.0-alpha.137"
 			|| migration.source_data_version != 13 || migration.target_data_version != 14
 			|| migration.integration_modules?.anotherworld?.source != "0.0.0-alpha.56"
 			|| migration.integration_modules?.anotherworld?.target != "0.0.0-alpha.57"
@@ -3660,10 +3660,12 @@ tasks.register("verifyBackroom") {
 			|| !chest.contains("REFRESH_TICKS = 12_000L") || !chest.contains("ordinal == 3")
 			|| !architecture.contains("PLAYABLE_RADIUS = 2_000")
 			|| !architecture.contains("BackroomMaterialApi.anomalyMaterial()")
+			|| !architecture.contains("placeLootLandmark")
 			|| !layout.contains("WORLD_MIN_Y = -64") || !layout.contains("WORLD_MAX_Y_EXCLUSIVE = 384")
 			|| !layout.contains("LEVEL_0(295, 383)") || !layout.contains("LEVEL_4(-64, 27)")
 			|| !layout.contains("mazeConnected") || !layout.contains("RoomCorner")
-			|| !layout.contains("EXIT_BED_CELL_SIZE_CHUNKS = 10")
+			|| !layout.contains("LOOT_CHEST_CELL_SIZE_CHUNKS = 3") || !layout.contains("lootChestChunk")
+			|| !layout.contains("EXIT_BED_CELL_SIZE_CHUNKS = 3")
 			|| !layout.contains("exitBedChunk") || !layout.contains("exitBedFloor")
 			|| !materialApi.contains("registerAnomalyMaterial")
 			|| locales.any { !it.containsKey("dimension.sanctuary.backroom")
diff --git a/sanctuary/src/main/java/fr/koka99cab/sanctuary26/sanctuary/worldgen/feature/BackroomArchitectureFeature.java b/sanctuary/src/main/java/fr/koka99cab/sanctuary26/sanctuary/worldgen/feature/BackroomArchitectureFeature.java
index e1eb495..96cd0e1 100644
--- a/sanctuary/src/main/java/fr/koka99cab/sanctuary26/sanctuary/worldgen/feature/BackroomArchitectureFeature.java
+++ b/sanctuary/src/main/java/fr/koka99cab/sanctuary26/sanctuary/worldgen/feature/BackroomArchitectureFeature.java
@@ -77,7 +77,7 @@ public final class BackroomArchitectureFeature extends Feature<NoneFeatureConfig
 		buildCity(level, worldSeed, startX, startZ, chunkX, chunkZ);
 		buildUtilities(level, worldSeed, startX, startZ);
 		buildGlitchMaze(level, worldSeed, startX, startZ);
-		placeLootLandmarks(level, worldSeed, startX, startZ, chunkX, chunkZ, random);
+		placeLootLandmarks(level, worldSeed, startX, startZ, chunkX, chunkZ);
 		placeRareAnomaly(level, startX, startZ, random);
 		return true;
 	}
@@ -416,14 +416,11 @@ public final class BackroomArchitectureFeature extends Feature<NoneFeatureConfig
 	}
 
 	private static void placeLootLandmarks(WorldGenLevel level, long seed, int x0, int z0,
-		int chunkX, int chunkZ, Random random) {
-		if (random.nextInt(5) == 0) {
-			BackroomLevel zone = BackroomLevel.values()[random.nextInt(BackroomLevel.values().length)];
-			int floorY = BackroomLayout.exitBedFloor(zone);
-			int x = x0 + 7, y = floorY + 1, z = z0 + 7;
-			set(level, x, floorY, z, floorMaterial(zone));
-			set(level, x, y, z, Blocks.CHEST.defaultBlockState());
-			set(level, x, y + 1, z, Blocks.AIR.defaultBlockState());
+		int chunkX, int chunkZ) {
+		for (BackroomLevel zone : BackroomLevel.values()) {
+			if (BackroomLayout.lootChestChunk(seed, zone, chunkX, chunkZ)) {
+				placeLootLandmark(level, zone, x0 + 7, z0 + 7);
+			}
 		}
 		for (BackroomLevel zone : BackroomLevel.values()) {
 			if (!BackroomLayout.exitBedChunk(seed, zone, chunkX, chunkZ)) continue;
@@ -438,6 +435,16 @@ public final class BackroomArchitectureFeature extends Feature<NoneFeatureConfig
 		}
 	}
 
+	private static void placeLootLandmark(WorldGenLevel level, BackroomLevel zone, int x, int z) {
+		int floorY = BackroomLayout.exitBedFloor(zone);
+		for (int dx = -1; dx <= 1; dx++) for (int dz = -1; dz <= 1; dz++) {
+			set(level, x + dx, floorY, z + dz, floorMaterial(zone));
+			for (int dy = 1; dy <= 2; dy++) set(level, x + dx, floorY + dy, z + dz,
+				Blocks.AIR.defaultBlockState());
+		}
+		set(level, x, floorY + 1, z, Blocks.CHEST.defaultBlockState());
+	}
+
 	private static void placeRareAnomaly(WorldGenLevel level, int x0, int z0, Random random) {
 		if (random.nextInt(96) == 0) {
 			Block anomaly = BackroomMaterialApi.anomalyMaterial();
diff --git a/sanctuary/src/main/java/fr/koka99cab/sanctuary26/sanctuary/worldgen/feature/BackroomLayout.java b/sanctuary/src/main/java/fr/koka99cab/sanctuary26/sanctuary/worldgen/feature/BackroomLayout.java
index 086e370..36cd531 100644
--- a/sanctuary/src/main/java/fr/koka99cab/sanctuary26/sanctuary/worldgen/feature/BackroomLayout.java
+++ b/sanctuary/src/main/java/fr/koka99cab/sanctuary26/sanctuary/worldgen/feature/BackroomLayout.java
@@ -13,7 +13,8 @@ public final class BackroomLayout {
 	public static final int ROOM_SIZE = 16;
 	public static final int MAZE_FLOOR_Y = 8;
 	public static final int MAZE_ROOF_Y = 18;
-	public static final int EXIT_BED_CELL_SIZE_CHUNKS = 10;
+	public static final int EXIT_BED_CELL_SIZE_CHUNKS = 3;
+	public static final int LOOT_CHEST_CELL_SIZE_CHUNKS = 3;
 	private static final int HOLE_CELL_SIZE = 64;
 
 	private BackroomLayout() {}
@@ -91,7 +92,21 @@ public final class BackroomLayout {
 		return Math.floorMod((int) mix(seed ^ 0x43c2a1769f0e85bdL, chunkX, chunkZ), 11) == 0;
 	}
 
-	/** One deterministic, rare exit-bed chunk per grid cell and per vertical level. */
+	/** One easy-to-find loot landmark per three-by-three chunk cell and per vertical level. */
+	public static boolean lootChestChunk(long seed, BackroomLevel level, int chunkX, int chunkZ) {
+		Objects.requireNonNull(level, "level");
+		int cellX = Math.floorDiv(chunkX, LOOT_CHEST_CELL_SIZE_CHUNKS);
+		int cellZ = Math.floorDiv(chunkZ, LOOT_CHEST_CELL_SIZE_CHUNKS);
+		long hash = mix(seed ^ 0x354c6f3a82d9e107L ^ (long) level.ordinal() * 0x9e3779b97f4a7c15L,
+			cellX, cellZ);
+		int targetX = cellX * LOOT_CHEST_CELL_SIZE_CHUNKS
+			+ Math.floorMod((int) hash, LOOT_CHEST_CELL_SIZE_CHUNKS);
+		int targetZ = cellZ * LOOT_CHEST_CELL_SIZE_CHUNKS
+			+ Math.floorMod((int) (hash >>> 32), LOOT_CHEST_CELL_SIZE_CHUNKS);
+		return chunkX == targetX && chunkZ == targetZ;
+	}
+
+	/** One deterministic exit-bed chunk per three-by-three grid cell and per vertical level. */
 	public static boolean exitBedChunk(long seed, BackroomLevel level, int chunkX, int chunkZ) {
 		Objects.requireNonNull(level, "level");
 		int cellX = Math.floorDiv(chunkX, EXIT_BED_CELL_SIZE_CHUNKS);
diff --git a/sanctuary/src/test/java/fr/koka99cab/sanctuary26/sanctuary/backroom/BackroomModelSmoke.java b/sanctuary/src/test/java/fr/koka99cab/sanctuary26/sanctuary/backroom/BackroomModelSmoke.java
index 10aca2f..ee03478 100644
--- a/sanctuary/src/test/java/fr/koka99cab/sanctuary26/sanctuary/backroom/BackroomModelSmoke.java
+++ b/sanctuary/src/test/java/fr/koka99cab/sanctuary26/sanctuary/backroom/BackroomModelSmoke.java
@@ -25,6 +25,7 @@ public final class BackroomModelSmoke {
 		personalRecoveryIsPrioritized();
 		recentLossesRemainPersonal();
 		architectureIsDeterministicAndStacked();
+		lootLandmarksCoverEveryLevel();
 		exitBedsCoverEveryLevel();
 		roomCornersReachEveryVariant();
 		mazeDoorsStayConnected();
@@ -130,6 +131,7 @@ public final class BackroomModelSmoke {
 	private static void exitBedsCoverEveryLevel() {
 		long seed = 26_200_133L;
 		int cellSize = BackroomLayout.EXIT_BED_CELL_SIZE_CHUNKS;
+		require(cellSize == 3, "Backroom exit beds are no longer spaced three chunks apart");
 		for (BackroomLevel level : BackroomLevel.values()) {
 			int floorY = BackroomLayout.exitBedFloor(level);
 			require(BackroomLayout.levelAt(floorY) == level,
@@ -142,7 +144,25 @@ public final class BackroomModelSmoke {
 					}
 				}
 				require(candidates == 1,
-					"A Backroom level lost its single rare exit bed in a generation cell: " + level);
+					"A Backroom level lost its exit bed in a three-by-three chunk cell: " + level);
+			}
+		}
+	}
+
+	private static void lootLandmarksCoverEveryLevel() {
+		long seed = 26_200_137L;
+		int cellSize = BackroomLayout.LOOT_CHEST_CELL_SIZE_CHUNKS;
+		require(cellSize == 3, "Backroom loot landmarks are no longer spaced three chunks apart");
+		for (BackroomLevel level : BackroomLevel.values()) {
+			for (int cellX = -4; cellX <= 4; cellX++) for (int cellZ = -4; cellZ <= 4; cellZ++) {
+				int candidates = 0;
+				for (int chunkX = cellX * cellSize; chunkX < (cellX + 1) * cellSize; chunkX++) {
+					for (int chunkZ = cellZ * cellSize; chunkZ < (cellZ + 1) * cellSize; chunkZ++) {
+						if (BackroomLayout.lootChestChunk(seed, level, chunkX, chunkZ)) candidates++;
+					}
+				}
+				require(candidates == 1,
+					"A Backroom level lost its loot landmark in a three-by-three chunk cell: " + level);
 			}
 		}
 	}