I recommend against using additive overlays; I remember they seem to cause lag or something if used in excessive amounts, as they are all func_illusionaries and increase the entity server load. Anyways, I think I already commented on this... But here's some more! I'm not too sure how it looks with an env_gamma in-game, but right now the screenshots really make it look dark. Remember it's only supposed to FEEL dark, not actually be dark. Maybe a few shadowy corners and that's it. Nice job on the infestation; I hope the wpoly is manageble and it doesn't drive your planes up too much.

Yeah i definately need to do a nice additive overlay for that texture. Cheers for reminding me and cheers for the nice comments

The light fixtures on the stairs look clashing against the actual stair texture, probably because the border of it is lit up. Perhaps if you used an additive glow texture in front as the actual texture light it would merge better? Otherwise everything is looking really nice, I love the infested stuff in there, which compared to a lot of NS maps you see this actually LOOKS really infested. Good job so far.