I think the vehicle tracks need adjustment. First of all, the dark smudge on sand road looks like the tires are spilling ink. On a road like this, a motorcycle should only leave a slight groove with shaded edges maybe, but without discoloration.
Besides, There are other examples where the vehicle marks are overdone, like totally black ground after rolling over snow, in an environment where under the snow there is grass (Ardennes). And when an APC with rubber tires rolls on tarmack, it leaves intense shredding marks like a steel tank track. Someone has to to come up with a better solution to these vehicle marks than what we have now.