GP4 Builder ist ein 3D-Objekt-Editor und ein Rennstrecken Editor für Grand Prix 4. Mit dem GP4 Builder können sämtliche 3D-Objekte in GP4 geändert werden. Mit dem Programm können Rennstrecken geändert bzw. komplett neu erstellt werden. Eine Anleitung liegt dem Programm bei.

Features (englisch, Quelle 3D Builder Homepage):

- Edit vertice, faces, parts or whole objects 

- Create new primitive objects 

- Generate .gp4 track from .dat in one click

- Generate whole .bin from .dat file and .col files from .dat or .gp4 file

- Import objects from other .gp4 files or from .3ds files. 

- Search objects by name, textures or materials

- Unlimited objects move/rotation/scaling undo function

- Add, change, delete or rename textures and materials 

- Edit sunlight direction

- Create and edit track sectors and cc-line sections

- Add kerbs, fences or object shadows in one click 

- Edit off track car behaviour (.col files)

Supported Formats

.gpb (GP4Builder format)

.gp4 and .3ds files (3D graphics)

.dat files (physical track)

.col files (surfaces behaviours)

.bin files (tarmac)

.cfp files (crowd)

.ccl files (cc-line)

.tcm files (cameras)

Display

- Realtime Opengl Preview

- Dynamic Clipping to avoid overlapping surfaces

- Optimized code for very short loading times 

- trackside and onboard cameras motion preview

- textured, untextured or wireframe display modes 

- Perspective or Orthographic View