Texture Filtering Image Quality - No and 2X aniso
Texture filtering image quality is analysed to make sure it's up to par with what the hardware is supposed to be capable of.No anisotropic filtering
FilterTest - High Quality - No Aniso - Click for full size .png (~1MB)
Serious Sam - High Quality - No Aniso - Click for full size .png (~2.4MB)
A full trilinear filter is being performed and the hardware's trilinear precision seems to be a full eight bits, although I can't be certain without further testing. With five bit LOD filter precision on R360, one of the criticisms aimed at ATI's hardware in recent times looks like it has been addressed.
2X anisotropic filtering
FilterTest - High Quality - 2X Aniso - Click for full size .png (~1MB)
Serious Sam - High Quality - 2X Aniso - Click for full size .png (~2.4MB)
Again, the trilinear filter is present on all texture stages when anistropic filtering is enabled, as long as Application preference AF is set in the control panel. If you use the control panel to force AF, R420 only does trilinear filtering on the first texture stage with bilinear on the rest. It's behaviour carried over from R3x0 and previous drivers. The angle dependant nature of ATI's implementation makes itself known with 45° angles seeing the most filtering performed at the best level of detail.
