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 3dfx Hardware & Software
 Voodoo4/5 Discussions
 Mip map dithering!
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53 Posts

Posted - 07/04/2004 :  22:48:27  Show Profile  Visit darkfalz's Homepage  Reply with Quote
I tried Mip Map dithering on my Voodoo 5 AGES ago on one game, Ultima IX, and all I noticed was that mip maps had a ugly dithering between them which was probably more distracting than normal bilinear mip map levels. I turned it off never touched the option again.

Until today, when I was playing around with my old system. I turned it on and fired up Quake 3. Being used to the rather obvious mip mapping in Quake 3, especially with certain floor textures, I was AMAZED at how it looked with mip map dithering on. It looked damn close to trilinear! This was something I never thought the card could do. It didn't look anything like the actual "dithering" that I remember. There was a smooth gradiation between mip map levels.

Needless to say, I'm rather shocked at having missed out on that IQ improvement at the time. Of course now I use anisotropic on my new syste, it still looks crap by comparison, but it looks a lot better than bilinear.

Now the 3dfx help says this is achieved by blending between mip map levels. Isn't that basically what has been said about NVIDIA and it's cheating trilinear or "brilinear" filtering? Or is it yet another fake trilinear method?

OS Microsoft Windows XP Professional SP2 CPU Intel Pentium 4 3.0 GHz with HT (Northwood)
Motherboard ASUS P4P800 Deluxe RAM 1 GB Kingston DDR400 3-3-3-8 Dual Channel
Video NVIDIA GeForce 6600 GT AGP 256 MB Audio SoundMAX Digital Audio

OS Microsoft Windows ME CPU Intel Pentium III 1.0 GHz (Coppermine)
Motherboard ASUS P3V4X RAM 256 MB Kingston PC133 2-2-2-6
Video 3dfx Voodoo5 5500 AGP 64 MB Audio Creative Sound Blaster Live!


28 Posts

Posted - 09/04/2004 :  01:41:38  Show Profile  Visit Blazkowicz's Homepage  Click to see Blazkowicz's MSN Messenger address  Reply with Quote
I have always found it sucks so I've always disabled it
but it really looks good in quake3, thanks for the info :)
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