Just a couple of minor things I noticed on RallyX Green, at the apex of turn 2 and just before you enter the dirt section there are 2 patches of groung where the skid marks flash. Also on the last dirt corner there are some trucks on the outfield of the circuit, the rear of the blue one is inside a tree.
There is a fun one at KY National. The sand trap on the left, as you turn into the infield, has a dip in it although the wall doesn't dip with it. Most cars (provided their setup allows them to be driven through sand) will drive underneath it and fly out the otherside back onto the oval and then reset back on track with a flat arse.
Also a similar thing at the chicane before the pit entrance of Aston GP/Historic (on the left).
KY National
- also if u hit the end of the pit/track seperator walls very fast, u fly like mad, and land outside the track.
- then when u reset, u are standing on top of the fence.