If 3D model data is provided, then we would like this in any of these formats:
We Recommended FBX or GLB (with textures embedded) is the preferred file format for none CAD models, i.e. outputted from Cinema4D and others.
OBJ with Materials and Textures embeded
STEP for CAD and none Textured/label products
For more Solid/Cad models, Any of the popular formats would be accepted, IGES
Autodesk Inventor .IPT .IAM
CATIA V4 .MODEL .DLV4 .DLV3 .DLV
SolidWorks .SLDPRT .SLDASM
...