onst vertices = threeGeometry.attributes.position.array;
			meshGeometry = new YUKA.MeshGeometry( vertices );

			createBVH();

		}

		function createBVH() {

			if ( helper ) removeHelper();

			const bvh = new YUKA.BVH( params.branchingFactor, params.primitivesPerNode, params.depth );
			bvh.fromMeshGeometry( meshGeometry );

			helper = createBVHHelper( bvh, params.depth );
			scene.add( helper );

		}

		function removeHelper() {

			helper.traverse( ( child ) => {

				if ( child.isLineSegments ) {

		