I'm playing with the demo right now (air space), not super intuitive, but there are a lot of doc to read :)

Thanks for the link !

> Indeed Michael, that's what they seems to call geometry tolerance in the settings (you can drop to 0.25 pixel) ... well ... I like the idea :)
I know the technique for micro-displacement map, but I didn't know it was used for rendering nurbs ... learning new stuffs everyday !