diff --git a/packages/frontend/assets/room/objects/photoframe/photo-uv.png b/packages/frontend/assets/room/objects/photoframe/photo-uv.png
deleted file mode 100644
index 9b94906413..0000000000
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diff --git a/packages/frontend/assets/room/objects/photoframe/photo.jpg b/packages/frontend/assets/room/objects/photoframe/photo.jpg
deleted file mode 100644
index af14f0f36a..0000000000
Binary files a/packages/frontend/assets/room/objects/photoframe/photo.jpg and /dev/null differ
diff --git a/packages/frontend/assets/room/objects/photoframe/photoframe.blend b/packages/frontend/assets/room/objects/photoframe/photoframe.blend
deleted file mode 100644
index 4224cde45b..0000000000
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diff --git a/packages/frontend/assets/room/objects/photoframe/photoframe.glb b/packages/frontend/assets/room/objects/photoframe/photoframe.glb
deleted file mode 100644
index 4255a77de6..0000000000
Binary files a/packages/frontend/assets/room/objects/photoframe/photoframe.glb and /dev/null differ
diff --git a/packages/frontend/assets/room/objects/picture-frame/picture-frame.blend b/packages/frontend/assets/room/objects/picture-frame/picture-frame.blend
index 9901727872..33d703ec7b 100644
Binary files a/packages/frontend/assets/room/objects/picture-frame/picture-frame.blend and b/packages/frontend/assets/room/objects/picture-frame/picture-frame.blend differ
diff --git a/packages/frontend/assets/room/objects/picture-frame/picture-frame.glb b/packages/frontend/assets/room/objects/picture-frame/picture-frame.glb
index adaa1ffe69..bbb6ee48fb 100644
Binary files a/packages/frontend/assets/room/objects/picture-frame/picture-frame.glb and b/packages/frontend/assets/room/objects/picture-frame/picture-frame.glb differ
diff --git a/packages/frontend/assets/room/objects/tabletop-picture-frame/tabletop-picture-frame.blend b/packages/frontend/assets/room/objects/tabletop-picture-frame/tabletop-picture-frame.blend
index ce1d379dca..3ae45934a6 100644
Binary files a/packages/frontend/assets/room/objects/tabletop-picture-frame/tabletop-picture-frame.blend and b/packages/frontend/assets/room/objects/tabletop-picture-frame/tabletop-picture-frame.blend differ
diff --git a/packages/frontend/assets/room/objects/tabletop-picture-frame/tabletop-picture-frame.glb b/packages/frontend/assets/room/objects/tabletop-picture-frame/tabletop-picture-frame.glb
index 0154a7ba06..195734f8f3 100644
Binary files a/packages/frontend/assets/room/objects/tabletop-picture-frame/tabletop-picture-frame.glb and b/packages/frontend/assets/room/objects/tabletop-picture-frame/tabletop-picture-frame.glb differ
diff --git a/packages/frontend/src/pages/room.vue b/packages/frontend/src/pages/room.vue
index 63158deb05..802ada2204 100644
--- a/packages/frontend/src/pages/room.vue
+++ b/packages/frontend/src/pages/room.vue
@@ -61,6 +61,7 @@ SPDX-License-Identifier: AGPL-3.0-only
 			<MkButton :primary="engine.isEditMode.value" @click="toggleEditMode">Edit mode: {{ engine.isEditMode.value ? 'on' : 'off' }}</MkButton>
 			<MkButton @click="addObject">addObject</MkButton>
 			<MkButton primary @click="save">save</MkButton>
+			<MkButton @click="showBoundingBox">showBoundingBox</MkButton>
 		</div>
 	</template>
 </div>
@@ -578,6 +579,11 @@ function removeSelectedObject() {
 	canvas.value!.focus();
 }
 
+function showBoundingBox() {
+	engine.value?.showBoundingBox();
+	canvas.value!.focus();
+}
+
 function getHex(c: [number, number, number]) {
 	return `#${c.map(x => Math.round(x * 255).toString(16).padStart(2, '0')).join('')}`;
 }
diff --git a/packages/frontend/src/utility/room/engine.ts b/packages/frontend/src/utility/room/engine.ts
index d112a396d2..49f9c720b2 100644
--- a/packages/frontend/src/utility/room/engine.ts
+++ b/packages/frontend/src/utility/room/engine.ts
@@ -48,8 +48,35 @@ type RoomStateObject<Options = any> = {
 	sticky?: string | null;
 };
 
+type SimpleHeyaWallBase = {
+	material: null | 'wood' | 'concrete';
+	color: [number, number, number];
+};
+
+type Heya = {
+	type: 'simple';
+	options: {
+		size: [number, number];
+		window: 'none' | 'kosidakamado' | 'demado' | 'hakidasimado';
+		wallN: SimpleHeyaWallBase;
+		wallE: SimpleHeyaWallBase;
+		wallS: SimpleHeyaWallBase;
+		wallW: SimpleHeyaWallBase;
+		flooring: {
+			material: null | 'wood' | 'concrete';
+			color: [number, number, number];
+		};
+		ceiling: {
+			material: null | 'wood' | 'concrete';
+			color: [number, number, number];
+		};
+	};
+} | {
+	type: 'japanese';
+};
+
 type RoomState = {
-	roomType: 'default';
+	heya: Heya;
 	installedObjects: RoomStateObject<any>[];
 };
 
@@ -865,7 +892,6 @@ export class RoomEngine {
 
 				// シェイプキー(morph)を考慮してbounding boxを更新するために必要
 				mesh.refreshBoundingInfo({ applyMorph: true });
-				//mesh.showBoundingBox = _DEV_;
 
 				mesh.metadata = metadata;
 				mesh.checkCollisions = !hasCollisionMesh;
@@ -1289,6 +1315,14 @@ export class RoomEngine {
 		}
 	}
 
+	public showBoundingBox() {
+		for (const mesh of this.objectMeshs.values()) {
+			for (const m of mesh.getChildMeshes()) {
+				m.showBoundingBox = true;
+			}
+		}
+	}
+
 	public resize() {
 		this.engine.resize();
 	}
diff --git a/packages/frontend/src/utility/room/objects/pictureFrame.ts b/packages/frontend/src/utility/room/objects/pictureFrame.ts
index d12ab1aad3..7c6dd86f32 100644
--- a/packages/frontend/src/utility/room/objects/pictureFrame.ts
+++ b/packages/frontend/src/utility/room/objects/pictureFrame.ts
@@ -125,6 +125,7 @@ export const pictureFrame = defineObject({
 			matMesh.morphTargetManager!.getTargetByName('MatV')!.influence = options.matVThickness * options.height;
 			pictureMesh.morphTargetManager!.getTargetByName('Width')!.influence = options.width * (1 - options.matHThickness);
 			pictureMesh.morphTargetManager!.getTargetByName('Height')!.influence = options.height * (1 - options.matVThickness);
+			matMesh.isVisible = options.matHThickness > 0 || options.matVThickness > 0;
 			meshUpdated();
 
 			applyFit();
diff --git a/packages/frontend/src/utility/room/objects/tabletopPictureFrame.ts b/packages/frontend/src/utility/room/objects/tabletopPictureFrame.ts
index 352564e14f..3811b44f74 100644
--- a/packages/frontend/src/utility/room/objects/tabletopPictureFrame.ts
+++ b/packages/frontend/src/utility/room/objects/tabletopPictureFrame.ts
@@ -130,6 +130,7 @@ export const tabletopPictureFrame = defineObject({
 			pictureMesh.morphTargetManager!.getTargetByName('Height')!.influence = options.height * (1 - options.matVThickness);
 			pictureMesh.morphTargetManager!.getTargetByName('MatH')!.influence = options.matHThickness * options.width;
 			pictureMesh.morphTargetManager!.getTargetByName('MatV')!.influence = options.matVThickness * options.height;
+			matMesh.isVisible = options.matHThickness > 0 || options.matVThickness > 0;
 			meshUpdated();
 
 			applyFit();