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

[Codex]

The poly's of the trees would be done on the client PC's, it would have nothing to do with the server, all the server would have to worry about is the events on the map.

I just wonder if Oleg was to 'use' some of graphic tricks from the current FPS game engines (Unreal, Doom Crytek) that a lot more could be done in terms of graphics, what I suspect is that are certain patent issues to get around.