It's been a while since I've posted anything here. I made new textures for my asphalt/concrete and dirt/mud tires, trying out new things with spec maps. It's always hard to capture lighting in a RoR screenshot, but the dirty/worn areas do not shine, while the rest do. It looks pretty realistic in movement. Also, an interesting note is that DiggerFan's crushable cars from the 1985 Indy track appear as vehicles in .4.5, so they can be spawned in any terrain.
I've also been working on baking all of the bodies, which I didn't do when I originally textured them. So far I have the Praxis trucks done, which can be seen in the last two photos. A lot of other miscellaneous parts have been modified and added.