VREX supports the Open BIM, IFC file format for 3D models. VREX also has a direct plugin with Navisworks where any 3D model formats combined there can be published into VREX. A lot of design and construction teams that use Revit will often bring their combined models into Navisworks first and then publish from Navisworks to VREX. JT files are also supported and often used in mechanical and industrial design modeling software.