Hlbly and I are on the same "what if" path. Trees are rather solid objects and would absorb shell concussion (but would also most likely destroy the tree - possible resource hog,) , so they are fine as they are. Hedges however, I would like to react like the mini mounds (would raise vehicle and possibly change its direction and even flip it, rounds would go through and do damage, vehicles should be able to occupy the same space as a hedge). Basically, all hedge rows should be good for is the disruption of line of sight and additional camouflage.