Hi Pilou,

> ZBrush can makes some very precise things

No, not at all in the same sense as a NURBS modeler does. For example in a NURBS modeler if you do a boolean cut with a circle it's guaranteed that the shape of the hole is circular, either exactly a circle if it's on a plane or in the worst case fit to a specific tolerance level (in MoI 0.001 units).

In a polygon modeler like ZBrush there is just not any similar focus on precise geometry like that.

Now if you're only generating rendered images from the models you could certainly say that it's ok to have unknown precision as long as it looks good. But for manufacturing it's a very different case.

- Michael