message: Limit GUI rendering to 60fps to not starve CPU (esp. with low-core-count)
diff: @@ -534,7 +534,8 @@ namespace ospray {
  }
  renderEngine.unmapFramebuffer();
  - }
  + } else // limit GUI rendering to 60fps
  + std::this_thread::sleep_for(std::chrono::milliseconds(16));
  // set border color TODO maybe move to application
  vec4f texBorderCol(0.f); // default black
  