Voodoo 2 gamma issue \ VOGONS

Voodoo 2 gamma issue

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First post, by YetAnother98dude

Posted on 2025-05-27, 06:18

YetAnother98dude Offline

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I run a V2 Sli setup in my system, currently with a Geforce 4 Ti. Everything works great.
But if the Voodoos are being used for rendering everything is insanely dark. Gamma is set to 1.30. If I set it to 1.70 or 1.90 it doesn't have any effect whatsoever.
In need for speed III for example it's like every race takes place at night.

Happens on both fastvoodoo 4.6 and official drivers.

Reply 1 of 6, by Joseph_Joestar

Posted on 2025-05-27, 07:54

Joseph_Joestar Offline

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What refresh rate are you using?

Back when I was still using a CRT monitor, gamma adjustments didn't work at 120 Hz on my Voodoo 1, so I needed to lower the refresh rate to 85 Hz or something. Might be similar with the Voodoo 2.

My retro stuff

Reply 2 of 6, by YetAnother98dude

Posted on 2025-05-27, 08:37

YetAnother98dude Offline

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I'm using 85Hz for all resolutions.
I will try 60Hz and 75Hz and report back.

Reply 3 of 6, by Postman5

Posted on 2025-05-27, 12:31

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If you swap Voodoo2 master-slave, do the problems persist?

Reply 4 of 6, by YetAnother98dude

Posted on 2025-05-27, 21:07

YetAnother98dude Offline

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I did a little more testing switched the resolutions and refresh rates back and forth. The problem only occurs on 60Hz and 75Hz no matter the resolution. No issue on 85Hz and above.

Postman5 wrote on 2025-05-27, 12:31:

If you swap Voodoo2 master-slave, do the problems persist?

How? Just by plugging the VGA cable in the other card or can this be done in software?

Reply 5 of 6, by Postman5

Posted on 2025-05-28, 08:29

Postman5 Offline

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YetAnother98dude wrote on 2025-05-27, 21:07:

I did a little more testing switched the resolutions and refresh rates back and forth. The problem only occurs on 60Hz and 75Hz no matter the resolution. No issue on 85Hz and above.

Postman5 wrote on 2025-05-27, 12:31:

If you swap Voodoo2 master-slave, do the problems persist?

How? Just by plugging the VGA cable in the other card or can this be done in software?

physically swap the cards

Reply 6 of 6, by YetAnother98dude

Posted on 2025-05-28, 15:29

YetAnother98dude Offline

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That didn't work. Looks like I will just avoid 75Hz then.

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