Summary

I'm going to explain the basic steps to make the car:

• Import the lod_0 of the original gp4 car and save it as car1.z3d
  Import the lod_4 of the original gp4 car and save it as car_lod_4.z3d
  
• Modify the car using photos as the basis of our work. Calculate the normals
  
• Detach the car in the objects needed for a gp4 car (see the list) and order them in the same order as in the list.
  
• Map the car (remember to map the lod_4), and change the name of the materials to a different name (different of the names of the original gp4 teams).
  
• Paint the car.
  
• Create the tex files
  
• Make the shapes for gp4 exporting them using ZModeler (remember to load all the textures before exporting the car).
  
• Update your cars.wad with gp4-master or WadUpdater (with the tex and gp4 files created before).
  
• Change the helmet and steering wheel position,and the rims' color with Team editor. Modify the phisics of the car with GP4 Phisics Editor.
  
• Congratulations, you have made a gp4 car. Enjoy it.