If I import an off-file in stella and then export the model immediately without changing any orientation, the coordinates of the vertices in the exported off-file are all changed (rotated?) Why is this?

Paul

In 3D it should be possible to see half of the model on one side of the section (which side also being possible to select) in solid, while the other part being invisible.

Also the nets could be adapted for this situation so you could create paper models of truncated polyhedra, which should be ...

1) When I choose File/Export metric data I can see there dihedral angles, what I understand (angel between 2 planes), but what is a mitre angle (eg Cube 45 degrees)? I think both items should be explained in the glossary on the website.
2) How in Mouse Select Face/Vertex mode how can I DEselect the ...