Some minor updates.
Star particles in planetary systems now works like lens flares: they are occluded by planets.
Before (Sun is just hide beyond Saturn, but particle is still visible) / after (particle occluded like lens flare):
HarbingerDawn has made new Ceres texture map based on recent release form NASA. I take old John van Vleit's bump map, fix offset with the texture map, and manually paint up some prominent features in graphics editor. We are still waiting for a real elevation map release from NASA.