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MSAA and CSAA difference?
- Thread starter chrissss
- Start date
The main and loudly touted feature of CSAA is that it needs less resources than the classic multisampling. Nvidia claims the performance in 16x CSAA mode is going to be just a little lower than at 4x MSAA. We’ll talk about the speed factor below. Right now let’s discuss the quality factor.
16x CSAA ensures a higher-precision antialiasing in comparison with 4x MSAA, especially on small scene details, because it uses 4 times the number of coverage samples. It keeps the same color information as 4x MSAA, so the smoothed-out edges of polygons may look not as ideal as they would be with 16x MSAA.
Such a high level of multisampling would be too heavy even for the GeForce 8800 GTX, but we can compare 16x CSAA with 8x MSAA. The difference is smaller here and can hardly be revealed even with TheCompressonator, but 8x MSAA calculates the final pixel color with more accuracy than 16x CSAA does and, unlike 4x MSAA, doesn’t suffer much from the errors at determining if a pixel belongs to the smoothed-out polygon. 8x MSAA looks obviously better than 16x CSAA in terms of image quality, but we shouldn’t forget about speed.
It’s even harder to see the difference between 16x CSAA and 16xQ CSAA which stores more information about the color and depth (8 samples instead of 4), but 16xQ CSAA is surely the highest-quality antialiasing mode available today on a single graphics card.
Bla bla..
16x CSAA ensures a higher-precision antialiasing in comparison with 4x MSAA, especially on small scene details, because it uses 4 times the number of coverage samples. It keeps the same color information as 4x MSAA, so the smoothed-out edges of polygons may look not as ideal as they would be with 16x MSAA.
Such a high level of multisampling would be too heavy even for the GeForce 8800 GTX, but we can compare 16x CSAA with 8x MSAA. The difference is smaller here and can hardly be revealed even with TheCompressonator, but 8x MSAA calculates the final pixel color with more accuracy than 16x CSAA does and, unlike 4x MSAA, doesn’t suffer much from the errors at determining if a pixel belongs to the smoothed-out polygon. 8x MSAA looks obviously better than 16x CSAA in terms of image quality, but we shouldn’t forget about speed.
It’s even harder to see the difference between 16x CSAA and 16xQ CSAA which stores more information about the color and depth (8 samples instead of 4), but 16xQ CSAA is surely the highest-quality antialiasing mode available today on a single graphics card.
Bla bla..
Have a read of this, very interesting stuff
http://developer.nvidia.com/object/coverage-sampled-aa.html
Love the NVIDIA AA modes.
http://developer.nvidia.com/object/coverage-sampled-aa.html
Love the NVIDIA AA modes.
