SketchUp was never really designed to have curved objects in it at all. There isn't any way (at least last I checked in the SDK) for it to contain vertex normals so it's inevitably going to have shading problems.

However, with this particular case it looks like maybe the skinny triangles might be reversed as well. That may be the larger problem.

re:
> Do you think the Ngones .FBX internal triangulation could benefit from this centroid triangulation too ? I don't trust my Hou setup that much :P

I guess so but that would be a long process to try and get Autodesk to change that.

I kind of remember there may be an option to supply a triangulation, maybe I should do that.

- Michael