Ut2003 Aniso performance?

[BoddoZerg]

In the Anandtech review of the Radeon9700Pro, it seems like both the R300 and NV25 suffer an ungodly performance hit with Aniso in UT2003. The GF4 suffers a 40% hit just going from no aniso to 2x aniso. Why is this?

Also, it seems like the "2x Quality" mode is a bigger hit than "16x Performance", while "2x Performance" comes at no framerate cost whatsoever. What's the difference between quality and performance, is Anand comparing bilinear apples to trilinear oranges?

 

[Joe DeFuria]

Heh...I'm trying to find out the same thing in this thread:

http://www.beyond3d.com/forum/viewtopic.php?t=2143

 

[KimB]

One possibility:

If the benchmark scenes used have lots of long-range scenery (i.e. large outdoor scenes with relatively flat terrain), then the average degree of anisotropy will be very high, meaning a significant hit from enabling anisotropic filtering.

 

[Pete]

What's the difference between quality and performance

Try reading B3D's review for a hint.