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schellingb
Texture rendering issues in most 3dfx games
There's two texture issues when using 3dfx:
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Many games have very blurry textures. This might be due to a mipmap issue, and this problem was also mentioned by Digital Foundry at this point in their video - That is running on an Xbox Series X by the way, but i'm using Windows 10. First person shooters and racing games are affected most because textures will become blurry when viewed from an angle. Looking directly straight at a texture will sometimes make the blurriness go away (see video below). There's also some games which do not not have this issue at all, but many do.
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Trilinear filtering doesn't work in games which support this feature. At least with all the games i've tried so far (Quake 3 being an obvious example).
Neither of these issues occur on real hardware, or when running Windows 98 on DOSBox-X or PCem with a 3dfx Voodoo 1.
Here's a clear example of textures becoming blurry at angles:
https://user-images.githubusercontent.com/50634894/179727608-aafc39e6-3cb7-47dc-8cad-fefce5d8a6d7.mp4
So far only Windows games are affected. I haven't seen these problems in 3dfx DOS games, although i haven't tried many DOS games yet. Maybe other people can test some more?
So far i've tried:
- Several different Windows 98 Voodoo drivers, both official and unofficial.
- Different DirectX versions (6.1, 8.1 and 9c).
- Different video drivers in RetroArch (GL, Vulkan, D3D11/12).
None of them make any difference.
Can you clarify if you were using the software 3dfx emulation in DOSBox-X or if you had the glide or GL passthrough enabled?
I would have thought the software rendering should behave the same as in other DOSBox variants that have had the 3dfx patch applied but there's a chance I made a mistake when integrating it or someone has made improvements I'm not aware of.
Sorry for late reply, been insanely busy! As far as i can tell i'm not using passthrough. Video > 3dfx emulation is set to 'Internal Voodoo card'.