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Anisotropic Filtering Performance

shankly1985

shankly1985

shankly1985

Soldato
Joined
25 Nov 2011
Posts
20,679
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The KOP
I always put every game I play on 16x AF in the belief that AF is not an issue for performance.
Recently I noticed titles do in fact have a performance boost by dropping this settings, They was a game a while back, I forget the name now it also gained a boost dropping from 16x but at the time I thought it was just that title and ignored it. I am surprised to see more and more games I test this setting on see decent boost. Maybe its my 290 @1440p struggling here?

Anyway here is Metro 2033 Redux and you guys running 1440p with much higher end GPUs test this?
 
Not sure the exact technical details - I think Carmack covers it with some of his write up on RAGE where some stuff was forced to 8x AF or something - but with modern shader engines it can have some implications I believe.
 
8x is the sweet spot, 16x is good for some games like driving games and others that have a lot of long flat surfaces. 16x definitely does have a performance hit. It’s also unrealistic as in real life flat surfaces get blurry at an angle and over distance.
 
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