Motorcycle helmet was natively modeled and rendered in Autodesk maya 2020, however it works correctly in any previous version that arnold has, anyway materials are easy to recreate so it can be used in any other rendering engine with ease,so it can be used in any other engine or software , in the file that I leave from maya there are two scenes, one contains the exact scene that I use for the results you see in the previews, and another scene only contains the modeling. It contains a scene in c4d which later adapts the materials used in Maya so that they work correctly in c4d.
The UV of the body are correctly extracted for any customization that you want to make to the texturing.
Thanks for your purchase !