Whats the difference between AA and QSAA? - AVS Forum
Forum Jump: 
 
Thread Tools
post #1 of 10 Old 11-17-2009, 10:31 AM - Thread Starter
Member
 
jpokes85's Avatar
 
Join Date: Nov 2007
Posts: 75
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 0 Post(s)
Liked: 10
I am curious what the difference is between anti aliasing (AA) and QS anti aliasing (QSAA). I've noticed the QSAA option recently in a few games I have. Is one better quality than the other? Whats the deal?
jpokes85 is offline  
Sponsored Links
Advertisement
 
post #2 of 10 Old 11-18-2009, 08:59 AM - Thread Starter
Member
 
jpokes85's Avatar
 
Join Date: Nov 2007
Posts: 75
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 0 Post(s)
Liked: 10
Wow 40 views and no one knows the answer? At least I don't feel ignorant anymore :P
jpokes85 is offline  
post #3 of 10 Old 11-18-2009, 11:55 AM
AVS Special Member
 
krimson's Avatar
 
Join Date: Jan 2006
Location: Winnipeg, MB
Posts: 2,110
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 1 Post(s)
Liked: 17
A "Q" and an "S".

PSN / Steam - KrimsonStudios
krimson is online now  
post #4 of 10 Old 11-18-2009, 01:19 PM
 
darklordjames's Avatar
 
Join Date: Jun 2003
Posts: 7,909
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 0 Post(s)
Liked: 93
Isn't QSAA shorthand for Nvidia's quincunx? Roughly 3x MSAA at a 2x MSAA cost.
darklordjames is offline  
post #5 of 10 Old 11-19-2009, 01:57 PM
AVS Special Member
 
DrCrawn's Avatar
 
Join Date: Sep 2004
Location: under sniper fire, Seattle
Posts: 3,750
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 0 Post(s)
Liked: 10
Yes it's quincunx, and it's just a different pattern of anti-aliasing used on each pixel.
DrCrawn is offline  
post #6 of 10 Old 11-20-2009, 12:50 PM - Thread Starter
Member
 
jpokes85's Avatar
 
Join Date: Nov 2007
Posts: 75
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 0 Post(s)
Liked: 10
So... then is QSAA better? about the same?
jpokes85 is offline  
post #7 of 10 Old 11-20-2009, 01:47 PM
 
darklordjames's Avatar
 
Join Date: Jun 2003
Posts: 7,909
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 0 Post(s)
Liked: 93
Like I said, it's roughly the equivalent of 3x MSAA. Better than 2x, worse than 4x.

It gives you edge AA that is the same as 4x, but then introduces some texture blurring that you don't get with MSAA.
darklordjames is offline  
post #8 of 10 Old 11-20-2009, 03:07 PM - Thread Starter
Member
 
jpokes85's Avatar
 
Join Date: Nov 2007
Posts: 75
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 0 Post(s)
Liked: 10
I still don't quite understand. It would be one thing if I could only choose between AA and QSAA What if I have the option of say, 16x AA or 16QSAA. Are you saying there is more filtering going on in QSAA no matter if it says it is doing the same number of passes?
jpokes85 is offline  
post #9 of 10 Old 11-21-2009, 12:16 AM
 
darklordjames's Avatar
 
Join Date: Jun 2003
Posts: 7,909
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 0 Post(s)
Liked: 93
Let's put it another way. 16x QSAA would give you the same level of edge anti-aliasing as 16x MSAA, at the same cost as 8x MSAA. The trade-off is that textures will become blurrier, making 16x AF look like 4x AF.

MSAA is the quality option, QSAA is the speed option. In things like racing games, where you are moving too quickly for slight texture blurring to matter, but aliasing is super-apparent, then QSAA is a great choice. In something like Borderlands, where the unique texturing is a huge feature of the game, then QSAA is a crappy choice.

Personally, I say throw on 4x MSAA and 4x non-optimized AF and call it a day. Anything more is really a case of severely diminishing returns. Anything less is failing to take advantage of features that are essentially free on any moderately current card.
darklordjames is offline  
post #10 of 10 Old 11-21-2009, 07:50 AM - Thread Starter
Member
 
jpokes85's Avatar
 
Join Date: Nov 2007
Posts: 75
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 0 Post(s)
Liked: 10
ah ok I get you thanks for the help.
jpokes85 is offline  
Reply HTPC Gaming

User Tag List

Thread Tools
Show Printable Version Show Printable Version
Email this Page Email this Page


Forum Jump: 

Posting Rules  
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off
Trackbacks are Off
Pingbacks are Off
Refbacks are Off