Atoms Crowd currently support three renderers in Maya: Arnold, V-Ray and Renderman.
Once your materials are ready in your Maya scene you can export them using the our material exporter. For V-Ray, you should use the vrmat material converter: Create > V-Ray > Open V-Ray VRmat Converter.
For Arnold and renderman, you can access the exporters using the shelf buttons or via the menu: Atoms > Exporters > Arnold Material Exporter, Renderman Material Exporter
Just select your arnold material node and a file path.
The exporter will export the given material into a rib (Renderman) or ass (Arnold) file.
