As long as the .def files are set up correctly (I guess they are!) that could be your problem. Try resaving as a .dds, will need to be DXT5 if you can.
DXTBMP is the software I used to use for saving them :)
Thought I'd start with this one then - mainly because it's one of the photos I knew where to find on my laptop, but also one of my favourites. One of BA's 787's, just after departing 27L at London Heathrow. Hard to belive that this was taken in 2015 too! :)
We’ve got a great thread showing current projects for OMSI, so I thought it would be good to have the same for truck sim!
To get things started, I thought I’d share a few photos of the truck I’ve been working on. I started the project to fill some free time, and refresh my knowledge on...