A total newbie with a reskinning problem. Followed tutorial to reskin a stockcar in TR12 -- just changing heralds and car number. Cloned car following instructions; went to Computer, etc. & found relevant *.tga file in Userdata/editing and edited textures, reformatted to .tga with same file names as originals, saved and recommitted.
In Railyard after the recommit, the car end information is totally missing: old is gone; new not there.
Further troubleshooting shows that mesh file for the carbody does not support the edited .tga file containing herald and car number. Only 256 colour, 24 & 32 bit files supported. Will explore editor output further
Ideas on where to find more detailed instructions, or what I've done wrong would be welcome.