Hi Rainer, yes that's true - however it is not particularly easy to make a good quality triangulation mechanism which handles complex outlines properly.

Unless some special care is taken during the triangulation process, it is easy to get things like triangles that "leak" to the outside of concave boundaries and things like that.

That's mostly why some programs do not handle n-gons well, they just do not have a robust enough triangulator.

Also until MoI came along it was not really very common to get a whole lot of complex n-gons in incoming data so in some programs it is just an overall less tested area.

- Michael