How to create a robot with texture like STR or Carter in demos?

I want to create a robot with texture and finally export a usd file,but i cant find a software that is available.So i want to ask what software that nvidia used to create the robot like STR and Carter with textures.

Carter and STR were created using Maya and 3dsMax
omniverse provides connectors for these software, and others, that allow you to directly export to usd on a nucleus server

OK,I understood.Thank you very much.