message: fix picking viewport issues (e.g. for points)
diff: @@ -199,6 +199,7 @@ namespace Canvas3D {
  if (force || cameraChanged) {
  switch (variant) {
  case 'pick':
  + renderer.setViewport(0, 0, pickWidth, pickHeight);
  objectPickTarget.bind();
  renderer.clear()
  renderer.render(scene, 'pickObject');
  