Plain old hidden/isolated faces, yes. To reduce work load for large meshes. The point cloud is normalized to show roughly 50.000 vertices regardless of polycount. It just renders every Nth vertex for suitable N. I might add a slider to control the density if one would have other preferences. There will be a chaotic settings window with all kinds of program options at some point, stuff that I can't bother to fit into a nice interface
In that case i'm absolutely loving it and cant wait to try it out! That means you can have backfacing too, right? It's exciting because i have a cheapo card and this will help a lot with the finer details.