Click the Export icon, select GTA III/VC/SA DFF from the dropdown, and save your file. Method 3: Using 3ds Max (The Professional Choice)
: Check out the DragonFF GitHub Repository for the latest stable releases. ZModeler (Z3D) : convert obj to dff
For complex objects like vehicles, you must set up a specific hierarchy. Click the Export icon, select GTA III/VC/SA DFF