From 8d3a5a650398a2ea4d54a6bb2c3cbfd117822fc1 Mon Sep 17 00:00:00 2001
From: syuilo <4439005+syuilo@users.noreply.github.com>
Date: Thu, 23 Apr 2026 13:45:50 +0900
Subject: [PATCH] morph

---
 .../src/world/room/objects/randomBooks.ts     |  4 ++--
 packages/frontend/src/world/room/utility.ts   | 21 ++++++++++++++-----
 2 files changed, 18 insertions(+), 7 deletions(-)

diff --git a/packages/frontend/src/world/room/objects/randomBooks.ts b/packages/frontend/src/world/room/objects/randomBooks.ts
index 761a504bdd..8802ab7eb3 100644
--- a/packages/frontend/src/world/room/objects/randomBooks.ts
+++ b/packages/frontend/src/world/room/objects/randomBooks.ts
@@ -50,6 +50,7 @@ export const randomBooks = defineObject({
 	placement: 'top',
 	hasCollisions: false,
 	hasTexture: true,
+	canPreMeshesMerging: false,
 	createInstance: ({ options, model, scene, id }) => {
 		const bodyMesh = model.findMesh('__X_BODY__');
 		const tex = new BABYLON.Texture('/client-assets/room/objects/random-books/texture.png', scene, {
@@ -57,6 +58,7 @@ export const randomBooks = defineObject({
 			samplingMode: BABYLON.Texture.NEAREST_SAMPLINGMODE,
 		});
 		bodyMesh.material.albedoTexture = tex;
+		bodyMesh.isVisible = false;
 
 		const TEXTURE_DIVISION = 8;
 		let bookMeshes: BABYLON.Mesh[] = [];
@@ -127,8 +129,6 @@ export const randomBooks = defineObject({
 				}
 			}
 
-			bodyMesh.isVisible = false;
-
 			model.updated();
 		};
 
diff --git a/packages/frontend/src/world/room/utility.ts b/packages/frontend/src/world/room/utility.ts
index a1e1b49e4f..5d0d5c6497 100644
--- a/packages/frontend/src/world/room/utility.ts
+++ b/packages/frontend/src/world/room/utility.ts
@@ -269,11 +269,18 @@ export class ModelManager {
 			_toMerge.push(fixedMesh);
 		}
 
+		let hasMorphTarget = false;
+
 		const toMerge = [] as BABYLON.Mesh[];
 		for (const mesh of _toMerge) {
 			const newMesh = mesh.name.endsWith('_realized') ? mesh : mesh.clone(mesh.name + '_bakeMerged', null, true);
 			newMesh.makeGeometryUnique();
-			applyMorphTargetsToMesh(newMesh);
+			if (newMesh.morphTargetManager != null && newMesh.morphTargetManager.numTargets > 0) {
+				hasMorphTarget = true;
+				applyMorphTargetsToMesh(newMesh);
+				newMesh.morphTargetManager?.dispose();
+				newMesh.morphTargetManager = null;
+			}
 			if (newMesh.parent === this.root) {
 				newMesh.parent = null;
 			} else {
@@ -306,11 +313,15 @@ export class ModelManager {
 
 		const merged = BABYLON.Mesh.MergeMeshes(toMerge, true, false, undefined, false, true);
 		merged.parent = this.root;
+		merged.morphTargetManager?.dispose();
+		merged.morphTargetManager = null;
 
-		merged.material.freeze();
-		if (merged.material instanceof BABYLON.MultiMaterial) {
-			for (const subMat of merged.material.subMaterials) {
-				(subMat as BABYLON.PBRMaterial).freeze();
+		if (!hasMorphTarget) { // https://forum.babylonjs.com/t/is-it-intentional-that-morph-targets-do-not-work-on-meshes-with-frozen-materials/63252
+			merged.material.freeze();
+			if (merged.material instanceof BABYLON.MultiMaterial) {
+				for (const subMat of merged.material.subMaterials) {
+					(subMat as BABYLON.PBRMaterial).freeze();
+				}
 			}
 		}