mipmap dithering?

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Homer

New Member
Nov 26, 1999
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Hannover, Germany
www.bluestuff.de
does it work? If yes, how? For the record: playing linux UT 4.36, and set "UseTrilinear=True" in UnrealTournament.ini, which I always thought would do that.... so, anyone here able to clear things up?
 
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Metakill

Inhumane
Feb 18, 2000
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Redwood City, CA USA
Just curious: whats mipmap dithering? Mipmapping smooths textures at distances and sharp angles to prevent the "pixelated" look. How does dithering enter into it?
 

Homer

New Member
Nov 26, 1999
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Hannover, Germany
www.bluestuff.de
not quite. Mipmapping itself is the process of creating various versions of a texture with different resolutions for different distances, so you don't use a, say, 2048x2048 texture in a mile distance where nobody would see the detail.

Now without mipmap dithering you can see "jumps" in texture detail (good to see on DMAriza's floor textures). it's like you see a horizontal line where the higher res texture ends and the next lower texture begins.

I dunno how mipmap dithering in detail works, but it supresses this effect and smoothens out the transition between different mipmap levels.