@Graphics and Games Engineer Thanks for your explanation! I got a different problem. Would highly appreciate if you could help. I try to show/hide different meshes. Unfortunately, all examples I could find were about changing the material/color. I created an .usd with USD Composer and set up the different variants. When I view it in the USD Viewer, I can switch between the different meshes. However, when I convert the .usd to .usdz an want to look at it on my iPhone toggling between my variants doesn’t change anything. Could you please give an example how to archive that? I will also attach my file. Simple_Geo.usda Many thanks!