take useles here are the values taht u must enter to obtain the desired result
/seta r_picmip 1
/seta r_intensity 99
/seta r_lightmap 1
/seta r_overBrightBits 0
/seta r_mapOverBrightBits 0
an addition to that..you can have the black sky by puttin this file -->z-skies<-- in your basq3, dont worry dude its not a cheat and its downloadable on the Hs website :D
ask me if you nedd something or else.