Hello, I'm trying to figure out how to make a vehicle interior texture paintable at any LS Customs or using a trainer. To be specific, I'm not talking about making a livery, but actually making the texture compatible with in-game paint shops while preserving details such as stitching and bump mapping. I've heard it has something to do with an alpha channel, or possibly an opacity map? The texture I'm using already has an alpha channel but when I try to paint it in-game, it remains the same default brown color (see images). If anyone knows, how would you setup a vehicle texture to be paintable in-game?
What I already know:
-Most vehicles use shader material "vehicle_decal/badges/detail2" for interior paint.
-Most vehicles use shader material "vehicle_paint3" for exterior paint.
-You need to assign one of the following paint layers to the vehicle mesh you want to make paintable:
[Primary]
[Secondary]
[Wheel]
[Interior Trim]
[Dashboard]
Help is much appreciated. I'm using Blender-Sollumz and GIMP btw.