In OpenGL, I get the options “no anti-aliasing” (obvious function), “1.5x1.5”, “2x2 LOD bias”,or
“2x2”. Does anyone know what they settings mean, and which ones are better versus the others?
1.5x1.5 means your screen gets rendered at 1.5x its width and 1.5x its height, and then downsampled to the original resolution using filtering, producing an antialiased image.
The same for 2x2.
For example:
-1.5x1.5 with a 640x480 resolution actually renders internally at 960x720
-2x2 with a 640x480 resolution actually renders internally at 1280x960
LOD Bias tells the card use less texture memory by calculating the mipmaps as if it was rendered without antialiasing.
Check out this utility: http://www.guru3d.com/geforceaa/
Thanks for your help, I appreciate it!