GTX680 vs HD7970 with SGSSAA, user input requested

[BFG10K]

What is the difference between RGSS and SGSS - if there is any?

Rotated takes an ordered grid and simply rotates it a certain angle (typically 20-30 degrees). So there's still a patterned order to the samples, but they no longer line up horizontally & vertically like OG does.

Sparse is when the samples don't line up to any kind of grid, rotated or otherwise. So they’re pseudo-random.

Technically 2xAA & 4xAA are rotated while 8x is sparse, but with SSAA you still get the point across if you call them all SGSS.

 

[Granseth]

@ post # 50
There is a difference in text there. The green one. Alpha Test Texture on 7970 and Texture on 580, whatever that means.

 

[BFG10K]

@ post # 50
There is a difference in text there. The green one. Alpha Test Texture on 7970 and Texture on 580, whatever that means.

There are two possible reasons for that, but neither makes a difference in the context of this comparison.

 

[boxleitnerb]

@ post # 50
There is a difference in text there. The green one. Alpha Test Texture on 7970 and Texture on 580, whatever that means.

Version 5.1 vs version 5.4

 

[MTDEW]

I think i just learned more posting my incorrect understanding of something in a thread than i ever have before here on AT.
boxleitnerb, BFG10k,
Thanks for the respectful replies and info, it's more appreciated than you think.
Hopefully my ignorance gets a thread bumped that helps others to understand the info provided better also.

 

[cmdrdredd]

Just to clarify. To run sgssaa on nvidia cards you need to enable it wither globally or through a profile in inspector. Then either override the application settings for msaa and apply it there or set the game to a matching msaa level.

I have read that ideally you want to have msaa and sgssaa levels equal. So 8x/8x or 4x/4x since sgssaa uses the msaa settings to obtain the sample ranges. I have not played with it enough.

Does anyone know if setting csaa will be better or worse when running sgssaa. Like in older games that it works with such as source engine. Say 32x csaa and 8x sgssaa?

 

[Skurge]

So as long as the game has support for MSAA in game I can get SGSSA to work?

 

[Pottuvoi]

Does anyone know if setting csaa will be better or worse when running sgssaa. Like in older games that it works with such as source engine. Say 32x csaa and 8x sgssaa?

CSAA samples weight the result of MSAA sample, so basically it should work as well as with MSAA.
Problem with CSAA is that it can give wrong weight depending on draw order of primitives and thus using 8Q with SSAA is better choice.

Also why not test the proper 32xS mode. (2x2 + 8xMSAA and SGSSAA works with it.. (32xSSAA looks quite good.))

 

[boxleitnerb]

So as long as the game has support for MSAA in game I can get SGSSA to work?

Yes, but you can also get it to work if the game doesn't natively support MSAA. That's what compatibility bits are for. In most games you can force MSAA or SGSSAA.

 

[cmdrdredd]

CSAA samples weight the result of MSAA sample, so basically it should work as well as with MSAA.
Problem with CSAA is that it can give wrong weight depending on draw order of primitives and thus using 8Q with SSAA is better choice.

Also why not test the proper 32xS mode. (2x2 + 8xMSAA and SGSSAA works with it.. (32xSSAA looks quite good.))

Some graphics glitches appear with mixed mode aa. Like in dishonored the menu when you pause the game disappears. Would take some testing to see what works and what doesn't