Hi Maxime. Sorry for the confusion, I was referring to a Redshift material node, and a specific node called "Round Edge". We know that we can edit the rounded edges node via the API in Xpresso materials already, but we were trying to not use Xpresso here. Turns out, we can actually edit the Round Edge node in Redshift materials when we use c4dpy instead of executing the script by placing a .pyp file in the plugins folder. This solution works for us, so I think this issue is resolved. Thanks!