The layout is very nice but i can barely see anything cause you lit the whole level with only the skybox.
Add some more lights or brighten up the sky-shader or use another brighter sky or do one yourself, but definitely make the level brighter (some people really play with gamma 1.1 or 1.0
Port the black-wite and that CTF map to Nexuiz I like these maps... just like the one from the q3 mappack with "Es gibt keine Kettensäge", which means "there is no spoon"
1. Open Notepad
2. Paste: ÿþMSMSMS
3. Save
4. Open the file in Notepad again
You can vary the number of "MS", so you can clearly see it's MS which is causing it.