'Forms' and 'shapes' are just the visual simplification of anatomy. The Asaro Head is a great example of this. Anatomy is like the hard science behind why the shapes and forms are the way they are.
This is an interesting one, please email support@marmoset.co with example files (.tbscene and meshes) so we can add it to our bug tracking system. Thanks!
They do it for some DRM (example: http://store.steampowered.com/app/9860/ ) but not for everything, I think. @ McGreed - you don't mean irony, you mean sarcasm.