Re: C4D

Well, it can't just be an accident that C4D uses the good normals to start with - that means they have some support for vertex normals in there.

The problem is that pre-defined vertex normals don't really work well with further point manipulation. If you select a point of the model and drag it to a new location, the vertex normals need to be changed as well.

It is understandable that during that type of an edit that the "good normals" would be eliminated and other ones created by averaging polygon faces.

However, this is not the case for a "flip" edit - in the case of doing a direction flip it is possible to preserve all the normals and just flip their directions as well.

The problem is that C4D apparently treats a "flip" edit the same as a "drag point" edit.

If Steph could request to them to not destroy the existing normals on a "flip" edit, that would be a nice improvement to C4D.

- Michael