Sure, but I don’t do the random‑procedural “glitches” that other people love. A better way is to bake a small friction map that follows the slope and moss density of your terrain. Take the normal map, calculate the steepness angle for each texel, and multiply that by a moss coverage factor that you hand‑paint or sculpt. Feed that combined map into the wheel physics as a friction texture. Then bump the tire material’s damping a little on steep slopes so the wheels stay glued. It’s not a one‑liner, but it keeps the world looking natural and the car behaving nicely.

Glad it sounds good—just remember the moss should be subtle, not a thick blanket, otherwise the wheels get a free slip ride and the whole scene feels off. Keep the layers thin and the erosion lines clean, then you’ll have a realistic grip without any procedural gimmicks.

Sounds like a plan—just make sure the moss spread is intentional, not a random patchwork, and the erosion lines stay true to the slope. That way the terrain will feel alive, but the wheels will stay put. Good work.