Trees smoothed

DomoN has drawn my attention on the trees not smoothly shaded. Yes, they were not until now! :-) Exported to (non-rotated, exported normals) .obj instead of .3ds with normals set to smooth in blender. Looks much better...I had to spend some time figuring out that I've to modify the material files (.mtl) of the model and set Ka to 0.5 0.5 0.5 to have bright enough light on them.