tchId = batchId;
			}
		}

		function createMesh() {
			const geometryId = Math.floor(Math.random() * geometries.length);
		
			const geometry = geometries[geometryId];

			const material = new t3d.PBRMaterial();
			material.metalness = 0.4;
			material.roughness = 1;
			material.transparent = true;

			material.diffuse.setRGB(Math.random(), Math.random(), Math.random());
			material.opacity = 0.2 + Math.random() * 0.8;

			const mesh = new t3d.Mesh(geometry, material);
			mesh.position.set(
				Math.random