Comments on: John Carmack on Ideal Graphics

By: crazney

crazney — Wed, 30 Nov -0001 00:00:00 +0000

and to think im happy in 16bit to get a nice 150-200 fps in linux (q3a, non time-demo).. i think ill stick with that :-)

By: WCLPeter

WCLPeter — Wed, 30 Nov -0001 00:00:00 +0000

Ummm, I seem to remember reading way back in high-school biology classes that the human eye can’t distinguish any colour changes beyond 24 Bit colour.
[br]
So, what would be the use of having a card that can 64 bits worth of colour. Seems a waste to me.
[br]
Petey Pete…

By:

Wed, 30 Nov -0001 00:00:00 +0000

from what I understand, this is needed for doing scenes where you are making ALOT of passes over the scene to render it. Especially it you have shaders on top of shaders on top of shaders. Every time you pass over it with another shader, the color quality goes down a bit, to to point where a 32bit texture will come out looking like a grainy 8bit texture after being passed over so many times. Doom3 is supposed to do what 30 passes per frame? 10x more then quake3? So starting at 64 bits means you can have it look like 32 bits when its done, instead of starting at 32 and ending at 8.

Thats my understanding. Feel free to totally disagree and set me straight. My Carmack to English translation skills are not what they used to be.

By: dash

dash — Wed, 30 Nov -0001 00:00:00 +0000

Anyone remember “This is Spinal Tap” ? Carmack says he
hacked it so instead of his colors going from 0.0 to
1.0, they go from 0.0 to 2.0. I guess he needs that
extra boost beyond 1.0 :^).

By:

Wed, 30 Nov -0001 00:00:00 +0000

That from the man whose games just use shades
of brown anyway? Come on ;)