 w: 1 };
          quadLayer1.transform = new XRRigidTransform(pos, orient);

          // Make transparent placeholder node of the same size for quad layer
          // The placeholder node is in projection layer and thus can be used
          // for hit test
          quad1Collider = new QuadNode(QUAD_TRANSPARENT_MONO_PATH, 1, true);
          quad1Collider.translation = [-1, 0, -2];
          scene.addNode(quad1Collider);
        });

        quadTexture2 = loadTexture(gl, QUAD_TEXTURE_MONO_PATH, (w, h) 