K. Now first, I love this map.
BUT... there are a fewplaces where the brushes don't quite fit together (most are one or two areas that were duplicated), and void is visible through the cracks. More of an attention ot detail thing than a real issue, you may or may not fix it.
To see this issue, just do r_clear 1 to pink up the void, and do a map walkthrough. Mostly in the human base area and the big fat industrial tunnels with the curved brushes that must have been a stone cold to fit together properly. A couple more tiny ones below the alien base.