(specifically version 2.2.6) was the original tool used by modders in the mid-2000s. It is freeware and runs on older versions of Windows.
Converting files to DFF is a critical process for 3D modders, primarily those working with the RenderWare engine used in classic games like Grand Theft Auto III, Vice City, and San Andreas . While OBJ is a universal geometry format, DFF (RenderWare Model File) is a specialized binary format that contains the 3D mesh, materials, and sometimes collision data required for these games to function. Core Tools for OBJ to DFF Conversion convert obj to dff
The industry standard for GTA modding. It has native support for importing .OBJ and exporting .DFF. (specifically version 2