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Halo Custom Edition Article

Anisotropic filtering in Halo 1.03
In Halo 1.03, there is a new variable in your config.txt file that controls Anisotropic filtering. This procedure is expensive and if you are noticing a large drop in framerate, you should try disabling this feature. This only works on cards that support it so adding the variable to an unsupported card in config.txt will not enable Anisotropic filtering.

In your config.txt file, you'll see the config variable UseAnisotropicFilter listed at the top of the file with the other available variables. I'll show you how you can disable AnisotropicFiltering on your card if you wish to do so.

From the Nvidia section:


Code:
0x0301 = "GeForceFX 5800 Ultra"
0x0302 = "GeForceFX 5800"
0x0308 = "GeForceFX 2000"
0x0309 = "GeForceFX 1000"
0x0311 = "GeForceFX 5600 Ultra"
0x0312 = "GeForceFX 5600"
0x0318 = "GeForceFX"
0x0319 = "GeForceFX"
0x0321 = "GeForceFX 5200 Ultra"
0x032a = "GeForceFX 500"
0x032b = "GeForceFX 500"
0x032f = "GeForceFX 500"
0x0330 = "GeForceFX 5900 Ultra"
0x0331 = "GeForceFX 5900"
0x0332 = "GeForceFX 5900SE"
0x0338 = "GeForceFX 3000"
Unknown = "Unknown"
UseAnisotropicFilter

Let's say you have a GeforceFX 5900 Ultra and want to disable Anisotropic filtering. UseAnisotropicFilter is set only once for both Nvidia or ATI cards in their Unknown fallback case. In the case of Nvidia, you can find it set here:


Code:
0x0338 = "GeForceFX 3000"
Unknown = "Unknown"
UseAnisotropicFilter
All you need to do to disable Anisotropic filtering is comment out the line with a C/C++ style single line comment and save the file.

Like so:

Code:
0x0301 = "GeForceFX 5800 Ultra"
0x0302 = "GeForceFX 5800"
0x0308 = "GeForceFX 2000"
0x0309 = "GeForceFX 1000"
0x0311 = "GeForceFX 5600 Ultra"
0x0312 = "GeForceFX 5600"
0x0318 = "GeForceFX"
0x0319 = "GeForceFX"
0x0321 = "GeForceFX 5200 Ultra"
0x032a = "GeForceFX 500"
0x032b = "GeForceFX 500"
0x032f = "GeForceFX 500"
0x0330 = "GeForceFX 5900 Ultra"
0x0331 = "GeForceFX 5900"
0x0332 = "GeForceFX 5900SE"
0x0338 = "GeForceFX 3000"
Unknown = "Unknown"
//UseAnisotropicFilter


.

[Posted: May-28-2005 12:21 EST -  (Link)]