I think I didn't explained myself clearly enough. Let's try it again. I'm not trying to add a part made in Imagine and shape to a part made in GSD or vice versa. What I'm trying to do is 1. Create a part in Generative shape design. 2. Get that part made with GSD tools into Imagine and shape workbench. 3. Tweak it there without creating anymore surfaces or anything in the Imagine and shape workbench. I just want to move vertices and surfaces freely. I would like to use for example sculpting tool to modify a part made ONLY in GSD. You can do that of course if you create the part in Imagine and shape workbench.