Texture filtering quality
Texture filtering quality is unchanged versus NV40, so my analysis of that GPU's texture filtering IQ applies here. I'll quickly go through the anisotropic filtering (AF) modes though, for completeness. You can find images from Serious Sam in the NV40 article linked.No AF
With no anisotropic filtering being performed, the AF testes exposes basic filtering of the MIP stages instead. Remember that G70's texture samplers are slightly tweaked over NV40's, mostly for speed.
2x AF
The angles of anisotropy start to make themselves known with 2x AF. The hardware implements angle-adaptive AF for best performance, applying larger degrees of filtering only to textures at certain angles to the viewer.
4x AF
The 45° angle multiples see the most added filtering with 4x AF.
8x AF
8x applies the same logic, agressively filtering 45° multiples moreso than any others.
16x AF
G70's 16x aniso mode is its highest, offering the highest level of filtering at angle multiples much like 8x. Comparative performance next, using theoretical tests.
