Question on texture Filtering

[Borsti]

This has nothing to do with the ongoing ATI filtering discussion.

It´s just a (silly?) question that came into my mind when I watched the screenhots of my little selfmade Q3 level:

http://www.rivastation.com/temp/atifilter.png

You can see that the lines look much sharper with the colored mipmaps and are better filtered. We do also know that colored mipmaps don´t have a performance hit (as JC confirmed).

So is it possible to build some kind of texture filter that enhances IQ for free? I have no idea if the effect is still there if you only use small color changes, but...

Lars - THG

[Colourless]

Even though this doesn't answer your question, i'll post this here anyway. The reason why the lines disappear could be partly due to Quake 3 itself.

Try doing r_overBrightBits 0 in the console and restarting. Quake 3 does some tricks with gamma correction to get an increased dynamic range. That 'could' be causing problems when filtering bright textures. At the very least, I'm curious what the effect of doing that is.

[Borsti]

yes, that makes the results look better without colored mips. It seems to be Q3 specific. Thanks :-)

hm... but it means I can test the cards once again using this option...

Lars