If you are using CSM, there is a "shared" folder in the Cars folder which contains textures for common parts of the car. If these are missing for the specific car, then they will show as white parts as you mentioned.by RavishingRickRude - Grand Prix 4
First post updated with a link to an slightly better sweetfx setting. Just copy and paste in the Sweetfx folder in your main GP4 directory. This setting has even less of a hit on the PO.by RavishingRickRude - Grand Prix 4
I have been trying for a long time to get the sweetfx/reshade working for GP4 without the significant performance hit. I think I may have finally cracked it. The problem has always been the D3D8.dll supplied with reshade which seems to drain a fair chunk of PO and FPS. The trick was, in addition to using sweetfx/reshade, having a Dx8 wrapper called Dgvoodoo installed in the game directory. Also nby RavishingRickRude - Grand Prix 4