- Download KDFF GUI
- Launch kdffgui.exe
- Import the dff file using the dff button
- Leave
Optimize
box checked - Choose one of the following options:
- Empty: no collision
- Box: simple box collision (very optimized)
- Mesh Faces: matches all polygons
- Press
Make Col
to generate your .col file
PS: Don't overwrite existing .dff to have it integrate your new collision (this is only for SA-MP)
Base on this tutorial by Earl: