diff --git a/src/core/engine/SceneHelp.ts b/src/core/engine/SceneHelp.ts
index 50b1deb..9986816 100644
--- a/src/core/engine/SceneHelp.ts
+++ b/src/core/engine/SceneHelp.ts
@@ -81,14 +81,15 @@ export default class SceneHelp {
     this.scene.add(hemisphereLight)
 
     // 完全不透明的地板
-    // const geometry = new THREE.PlaneGeometry(gridOption.gridSize, gridOption.gridSize)
-    // const material = new THREE.MeshBasicMaterial({
-    //   color: '#ffffff',
-    //   side: THREE.BackSide
-    // })
-    // const ground = new THREE.Mesh(geometry, material)
-    // ground.rotation.x = -Math.PI / 2
-    // this.scene.add(ground)
+    const geometry = new THREE.PlaneGeometry(gridOption.gridSize, gridOption.gridSize)
+    const material = new THREE.MeshBasicMaterial({
+      color: '#ffffff',
+      side: THREE.BackSide
+    })
+    const ground = new THREE.Mesh(geometry, material)
+    ground.rotation.x = Math.PI / 2
+    ground.position.y = -0.01
+    this.scene.add(ground)
 
     // const directionalLight = new THREE.DirectionalLight(0xffffff, 1.5)
     // directionalLight.position.set(5, 5, 5).multiplyScalar(3)