neBack);

		const planeFront = new t3d.Mesh(planeGeometry, wallMaterial);
		planeFront.euler.set(-90 / 180 * Math.PI, 0, 0);
		planeFront.position.z = 50;
		planeFront.position.y = 50;
		scene.add(planeFront);

		const planeRight = new t3d.Mesh(planeGeometry, wallMaterial);
		planeRight.position.x = 50;
		planeRight.position.y = 50;
		planeRight.euler.set(0, 0, 90 / 180 * Math.PI);
		scene.add(planeRight);

		const planeLeft = new t3d.Mesh(planeGeometry, wallMaterial);
		planeLeft.position.x = -50;
		planeL