r1gl causing all skies to lose color quality

This has bugged me for the longest of time despite the benefits of using r1gl which has been great. All skies that would look just fine using default Quake II GL look bad like they are in very low bit color or something when using r1gl. I know I saw an answer to this somewhere else on the web but can't find it again through searching. Pretty certain it was as simple as a cvar, so if anyone knows what it is I'd be so grateful to have normal skies again! Thanks.

Graphics is ATI Radeon Xpress 1150 (integrated)