        // No VRDisplay found.
          gl.viewport(0, 0, webglCanvas.width, webglCanvas.height);
          mat4.perspective(projectionMat, Math.PI*0.4, webglCanvas.width / webglCanvas.height, 0.1, 1024.0);
          mat4.identity(viewMat);
          cubeSea.render(projectionMat, viewMat, stats);

          stats.renderOrtho();
        }

        stats.end();
      }
      })();
    </script>
  </body>
</html>
