here’s how it is - if I have all collision off I get 78 FPS. with collision on I get 16 FPS
I tried unchecking ‘Enable Collision’ for all Elements of every LOD of my tree, and that did help. now i get 32 FPS, but it’s clearly insufficient
for my purposes what I need is BlockAllDynamic, but I actually tried all the Collision modes (Pawn, BlockAllDynamic, BlockAll) and none of that made a difference 
sorry for hijacking this thread (though your other threads seem to be getting some attention as well 
). could you maybe tell me how big your level is, and the amount of trees you’ve placed?
thanks for the help