From b734ab34198d8be4748c13412800a0b1601a830b Mon Sep 17 00:00:00 2001
From: syuilo <4439005+syuilo@users.noreply.github.com>
Date: Wed, 22 Apr 2026 11:33:08 +0900
Subject: [PATCH] Update engine.ts

---
 packages/frontend/src/world/room/engine.ts | 1 +
 1 file changed, 1 insertion(+)

diff --git a/packages/frontend/src/world/room/engine.ts b/packages/frontend/src/world/room/engine.ts
index 635cd79b0e..467ec166e6 100644
--- a/packages/frontend/src/world/room/engine.ts
+++ b/packages/frontend/src/world/room/engine.ts
@@ -387,6 +387,7 @@ export class RoomEngine extends EventEmitter<RoomEngineEvents> {
 		this.gridMaterial.minorUnitVisibility = 1;
 		this.gridMaterial.opacity = 0.5;
 		this.gridMaterial.gridRatio = this.gridSnapping.scale;
+		this.gridMaterial.backFaceCulling = false;
 
 		this.gridPlane = BABYLON.MeshBuilder.CreatePlane('gridPlane', { width: cm(1000), height: cm(1000) }, this.scene);
 		this.gridPlane.material = this.gridMaterial;