Could someone please explain in simple terms what the big difference between the two approaches are? I'm confuzled about some stuff and it'll help me figure it out if I understood the differences 'tween MS & SS better.
Dumb question: MSAA vs SSAA, what is the big differences?
- Thread starter digitalwanderer
- Start date
Supersampling:
http://www.beyond3d.com/articles/ssaa/index3.php
Multisampling:
http://www.3dcenter.org/artikel/multisampling_anti-aliasing/index_e.php
Why not google? :?
http://www.beyond3d.com/articles/ssaa/index3.php
Multisampling:
http://www.3dcenter.org/artikel/multisampling_anti-aliasing/index_e.php
Why not google? :?
http://www.extremetech.com/article2/0,1558,1171858,00.asp
First gen AA was all SS, MS came in with DX8. Better performance, but experience has shown that the "generally solves" comment above was more than a little optimistic.
So SS is prettier than MS, but has more of a performance hit? That's what I thought, thanks.
A few reasons:_xxx_ said:
1. It's not as social
2. Google doesn't always take into account my "bit-o-a-thicky" nature
3. Me asking the question is sort of a hint.
Sort of. Multisampling is only effective on edges, but has a very small performance hit. Supersampling also helps texture aliasing, but is much slower (and generally quite a bit slower than multisampling + anisotropic filtering, and anisotropic filtering improves texture quality more than supersampling).digitalwanderer said:
However, there are cases where texture filtering doesn't get rid of aliasing that supersampling can. The old case is with textures that use an alpha test. More recently we have had an explosion of the use of bump mapping and other pixel shader effects. Bump mapping, in the way it's usually used, doesn't get antialiased properly with texture filtering (there are methods around this, though). It is worth mentioning that given enough developer effort, there is always a way to make texture filtering do the antialiasing for you.
Blazkowicz
Legend
other thing to consider for AA is ordered grid vs rotated/jittered grid.
Simply supersampling helps in cases of shader aliasing, multi-sampling doesn't.
Supersampling takes the average of N shader samples per colour (and usually depth as well but it isn't actually required...), whereas multisample uses a single sample per colour but uses a N sampled depth buffer to blend between the colours.
Multi-sampling is much cheaper, as you don't have to run the shader multiple times per pixel...
Note: Any texture lookup is a shader, so its often talked about in terms of textures however its possible to construct non-texture shaders which fail in the multisample case.
Supersampling takes the average of N shader samples per colour (and usually depth as well but it isn't actually required...), whereas multisample uses a single sample per colour but uses a N sampled depth buffer to blend between the colours.
Multi-sampling is much cheaper, as you don't have to run the shader multiple times per pixel...
Note: Any texture lookup is a shader, so its often talked about in terms of textures however its possible to construct non-texture shaders which fail in the multisample case.
So in little words SS will be able to work in all the newer games that I can't get MS to work in? :|DeanoC said:
Unfortunately in the console dominated gaming port scene AA does not seem to be very high on the developers effort list lately.Chalnoth said:
Games giving me grief with AA has got to be one of me current highest bitches with gaming.
