Tree branches contact - Drag or damage in Battle of Britain?

[bomath]

To have that kind of contact modelling the tree would need DM too.
I'd be happy to actually *see* the forest when I'm flying @ 10-30m altitude; right now I can see individual trees (if they're lonely in the middle of the terrain) but the forrest is depicted as horizontal textures, even with forest=3 in conf.ini; the horizontal textures obviously have no width/depth, so when you also fly horizontal and very close to the ground... BOOM!