message: remove default setting of spp; this is now controlled via ImGui widget.
diff: @@ -284,9 +284,6 @@ OSPRenderer createRenderer()
  // set the lights to the renderer
  ospSetData(renderer, "lights", lightsData);
  - // increase the samples per pixel
  - ospSet1i(renderer, "spp", 4);
  -
  // commit the renderer
  ospCommit(renderer);
  