Radeon 9800 anti aliasing works on some games, but not on others. \ VOGONS

Radeon 9800 anti aliasing works on some games, but not on others.

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First post, by retro games 100

Posted on 2010-09-11, 14:06

retro games 100 Offline

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I've installed a Radeon 9800 Pro card in Windows 98 SE. It seems to work. I run a couple of old D3D demos: "Jedi Knight" and "Mysteries of the Sith". You can see the jagged outlines of the buildings. I then go to the ATI control panel, and switch on anti-aliasing. I rerun these 2 games. You can then see that the jagged lines are more smooth. So that works. But when I run Quake 3 demo and Deus Ex demo, this effect does not work. Both games show jagged lines, if the AA is switched on or off. Any ideas please people?

Edit: I seem to remember that my Voodoo5 card worked correctly in "FSAA mode", for both the Deus Ex and Quake 3 demo games.

Reply 1 of 5, by leileilol

Posted on 2010-09-11, 15:27

leileilol Offline

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Try disabling Catalyst AI.

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Reply 2 of 5, by retro games 100

Posted on 2010-09-11, 15:50

retro games 100 Offline

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At the moment, I'm using ATI Catalyst driver version 6.2 for Window 98 SE. I think it's the last version that runs OK on Win9x. Inside the ATI control panel, I cannot see an option which says "Disable Catalyst AI". Inside the ATI control panel, I see these options -

3D settings -> Click on "Compatibility button" ->
Support DXT texture formats (Currently Enabled)
Alternate pixel center (Currently Disabled)

OpenGL Compatibility settings ->
Force Z-buffer depth = Disabled
Triple Buffering = Disabled

Options ->
Re-activate all warning messages (checkbox ticked)
Enabled ATI taskbar icon application (checkbox ticked)
Show ATI icon on taskbar (checkbox ticked)
Disable quick resolution feature (checkbox not ticked)
Also, 2 options about DVI...

Any ideas please? Thanks.

Reply 3 of 5, by Mau1wurf1977

Posted on 2010-09-11, 17:10

Mau1wurf1977 Offline

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Not sure if this applies to these older cards, but with AA support Nvidia was always ahead.

And didn't the Voodoo cards have Supersampling AA?

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Reply 4 of 5, by retro games 100

Posted on 2010-09-11, 17:42

retro games 100 Offline

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I tried 2 more games - the retail versions of Unreal and Unreal Tournament. Both of these games do not show any visual improvement when I activate AA. I double-checked that Jedi Knight was working with AA, and it was. Perhaps the Radeon 9800's ability to successfully do AA in Windows 98 is limited. Maybe I need to use a more modern version of the Catalyst driver, and therefore use Windows XP? I'm a bit disappointed, because I wanted to get a few more games working with AA in Win98.

Reply 5 of 5, by leileilol

Posted on 2010-09-11, 18:03

leileilol Offline

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If you don't have Catalyst AI, can you just rename your EXE files to get around it?

Catalyst AI = Internal game profiles

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