This issue is about 3D editor, Virtual Garage, but overhaul Vehicles Configurations.
I noticed that some textures variants, which are in the game files, are not actually available in-game.
These textures are mainly the Brown variant of the Strider, 2 variants of the Orca and 2 variants of the Mohawk.
They can be added with the Init of vehicles, but they're not visible until a preview is launched. {F27975}