Hi Lordfox, some programs can get confused with handling complex n-gons (polygons with more than 4 sides). Usually that looks kind of like you're describing with triangles leaking outside the shape.

If you run into that you should try using the "Export: Quads & Triangles" option at export time from MoI, that will triangulate any n-gons in MoI instead of the triangulation happening in the other app.

- MIchael