trees are low polygons but not too much low (biggest trees around 50.000 faces). all trees have 3 level of densty.
original polygon counts are around 50k maximum
LOD1 polygon counts are around 20k maximum
LOD2 polygon counts are around 8k maximum
all trees have vertex color data for simple wind and material variations. fbx formats include vertex color data too. if you import into other 3d applications, you have to mix leaf textures by vertex color map for best result.