diff --git a/packages/frontend/src/world/room/previewEngine.ts b/packages/frontend/src/world/room/previewEngine.ts
index 917f81e345..888e68e9c7 100644
--- a/packages/frontend/src/world/room/previewEngine.ts
+++ b/packages/frontend/src/world/room/previewEngine.ts
@@ -256,17 +256,11 @@ export class RoomObjectPreviewEngine {
 					if (mesh.material) {
 						if (mesh.material instanceof BABYLON.MultiMaterial) {
 							for (const subMat of mesh.material.subMaterials) {
-								if ((subMat as BABYLON.PBRMaterial).subSurface.isRefractionEnabled) {
-									(subMat as BABYLON.PBRMaterial).transparencyMode = BABYLON.PBRMaterial.PBRMATERIAL_ALPHABLEND;
-								}
 								(subMat as BABYLON.PBRMaterial).reflectionTexture = this.envMapIndoor;
 								(subMat as BABYLON.PBRMaterial).useGLTFLightFalloff = true; // Clustered Lightingではphysical falloffを持つマテリアルはアーチファクトが発生する https://doc.babylonjs.com/features/featuresDeepDive/lights/clusteredLighting/#materials-with-a-physical-falloff-may-cause-artefacts
 								(subMat as BABYLON.PBRMaterial).anisotropy.isEnabled = false; // なんかきれいにレンダリングされないため
 							}
 						} else {
-							if ((mesh.material as BABYLON.PBRMaterial).subSurface.isRefractionEnabled) {
-								(mesh.material as BABYLON.PBRMaterial).transparencyMode = BABYLON.PBRMaterial.PBRMATERIAL_ALPHABLEND;
-							}
 							(mesh.material as BABYLON.PBRMaterial).reflectionTexture = this.envMapIndoor;
 							(mesh.material as BABYLON.PBRMaterial).useGLTFLightFalloff = true; // Clustered Lightingではphysical falloffを持つマテリアルはアーチファクトが発生する https://doc.babylonjs.com/features/featuresDeepDive/lights/clusteredLighting/#materials-with-a-physical-falloff-may-cause-artefacts
 							(mesh.material as BABYLON.PBRMaterial).anisotropy.isEnabled = false; // なんかきれいにレンダリングされないため