it is comming the new Blender 2.49, and i don´t know if it is included already in the new version but, i want to comment it.
up to the 2.48a, the Bilinear filter (for textures) can not be changed to Trilinear or Anisotropic in any way…(i did search about it and nobody know how to change).
it is a great earn in quality, and is not expensive to the realtime render. We will get A LOT of more QUALITY with Trilinear filter with regards to Bilineal.
i want to suggest to be included by default the Trilineal filter for Textures in the Game Engine. And the possibility to can change to Anisotropic if you want use it.
Currently the hardware is a lot of Powerfull, we are not in the Voodoo 2 age already… the earn in quality is more than the FPS that you will lose using Trilineal or Anisotropic with regards to Bilineal…
UP
The only way to use anisotropic filtering in Blender viewports or “GE” game engine is to activate " anisotropic filtering" in the graphic card driver ( manualy, and restart application ). No way in blender
If you set "controled by application in the graphic card drivers, blender use mipmap with bilinear filtering…too old filtering…
cordialement, Pit