Nvidia GeForce 2 DXTC bug exposed

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While many hardware sites and magazines have looked at these cards in some detail, Anandtech and a few other sites reported a problem with images of the sky in Quake III which posed some questions about DXTC (Direct X Texture Compression) on GeForce 2 cards.

Nvidia is normally fast and effective in fixing bugs and the results of my own tests suggest that there is some hardware problem here which can't be solved merely by driver updates.

One test, in particular, looks completely different on the GeForce 2 and Radeon platforms, and again it is to do sky textures.


[align=center]<a href="http://www.theregister.co.uk/media/325.jpg" target="_blank"><img src="http://www.theregister.co.uk/media/326.jpg"></a>

<a href="http://www.theregister.co.uk/media/324.jpg" target="_blank"><img src="http://www.theregister.co.uk/media/327.jpg"></a>[/align]

from http://www.theregister.co.uk/content/2/15994.html

[Rezillo]

That is a serious difference. I want answers, and a fix. Or I want someones heads .................hahahahahha

[Insane Morphius]

That is a frickin huge difference. WOW!

Morph

[sbp]

Yeah there sure is a huge difference. Frigging Radeon doesn't have fog on!

http://www.ve3d.com/comments.taf?postID=10044
"The problem lies not in the GeForce2's texture compression, but rather in the Radeon's lack of support for the type of hardware fog/haze effect we implemented for DMZG.

The GeForce2 screenshot is correct. The Radeon 32 screenshot is only differentiated by the lack of fog."

[Rezillo]

I will now open my mouth and insert my foot, while wiping egg off my face. As should others.....thanks for clearing that up.

[Ladies Man]

gf2 looks like crap though

turn the damn fog off!

[Coco]

The Radeon does look nice, I don't care for that damn fog... the GeForce's screen shot look watched out...