Hi Olivier,

It's not a good idea to export with NGon options when exporting to software like ZBrush or 3DCoat.

I use 3D-Coat for texturing/painting/retopo and often the best export settings in Moi are :

- Quad+Tris
- Weld vertices
- Angle (it depends on the topology of the model that you are exporting, but in general between 3 and 10)
- Divide larger than : THIS IS THE CRUCIAL POINT. It depends on the scale of your model but in general I use values between 1 and 10
- Divide : ALL

With this settings all should works fine in 3D-Coat.

Here's a screen cap http://take.ms/hTRad

Best,

- Marco (mkdm)