Hmm, I think the sky texture is too bright to fit the map, I would rather see that it was night and no bright light up in the sky, it takes me of the mood of the map. I think that way it would be very cool to play it, gives you the creepy, "you're-alone"-feeling. And I don't know what others would think about this but bring down the lights on the outside just a tad to add to the "dark-creepy" feeling. Put r_sky 0 to get a little feel of what I mean (if you already don't)
Other than that great map, and no nex is needed.