There is a much difference in scenes rendered at 16bpp
modes and 32bpp modes. In the first case texture
filtering does not work (in the second is OK). Here are
some screenshots to demonstrate problem:
And same scenery in 32bpp:
You should note especially wall textures. There are
also strange colors (noticable on grass) but I think
that's related. I'm using Radeon 7500 QW.
Tested on two engines: "Return to Castle Wolfenstein"