The modern solution. Open source.
Blender is free, modern, and DragonFF eliminates 90% of the old headaches.
Step 1: Install Blender and DragonFF
Step 2: Import your OBJ
Step 3: Prepare the Hierarchy (Crucial for DFF)
Step 4: The Conversion
Troubleshooting: If the game crashes, you forgot to assign a texture TXD file. DFF requires a matching TXD. convert obj to dff
You will need one of the following tools (most are free or have free versions):
| Tool | Type | Best for | |------|------|----------| | ZModeler 2/3 | Paid (with free trial) | Vehicles, complex dummies | | DragonFF (Blender add-on) | Free | Weapons, peds, simple vehicles | | Kams Scripts (3ds Max) | Free/Abandonware | Classic GTA modding | | RWAnalyze | Free | Checking/editing DFF structure |
This report explains the process, tools, required files, common issues, and a recommended step-by-step workflow for converting a 3D model in Wavefront OBJ format (.obj/.mtl) to RenderWare DFF format (.dff), commonly used by older games (e.g., GTA series). It assumes a single static mesh, standard UVs, and common texture formats (PNG/JPG/TGA). The modern solution
ZModeler 2 (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.
You will encounter crashes. Here is why.
If you're modding classic games like Grand Theft Auto: San Andreas, GTA Vice City, or GTA III, you've likely encountered the .DFF file format. DFF (RenderWare Binary Stream) contains 3D model geometry, bones, and normals. Step 2: Import your OBJ
Meanwhile, .OBJ is a universal, human-readable format. However, you cannot simply rename the file—conversion requires specific tools and steps.
Before starting, ensure your .obj file is optimized:
