It looks really cool. I’ve downloaded it and built it.
Is the video in your post supposed to show something? It doesn’t play anything for me.
As a side note, a long time ago I wrote my own volume renderer/mesh viewer. And I still use it instead of newer, better applications (slicer or paraview) because it’s dead simple. Display the files in the command line argument. No scene setup or hooking together filters and classes and whatnot. Most of the time, I just want to see what’s in my volume or surface file. And F3D seems to be very much along the same lines. So kudos! 