Hello, I need to increase the anti-aliasing on a pure black model I have, because it is against a pure white background, so it really shows all the aliasing.

Is there a shader for this?

Is this something one would use shaders for?

I have A6 pro.

Thanks for any and all advice,
-Michael.

anti-aliasing is not done in shaders. you could still do some blurring with a post-processing shader, but you'd need a7 for that. i'm not sure if there are some kind of per-object blurring shaders - maybe with a vertex shader similar to one of the fur shaders.

Ok, thanks. I'll keep looking.

Why not, just render everything bigger in a target and run a postprocessing shader that scales it down to the selected resolution with a sophisticated algorithm.

yep, but that's way slower than native anti-aliasing. for 4x ssaa with optimized chain, 1024x768 you'd need a 4096x3072 render target (try to render that in a7), downsample it to 1024x768, which makes 16 texture lookups per downsampled pixel.

i've not found a proper implementation of shader-based antialiasing in the net. there are almost always drawbacks in terms of quality.

what I do is simple:
1) post-process the view and output the depth outlines
2) blur the previous stage only where there are outlines

its simple and relativley cheap (almost as cheap as hardware AA if you do it right)
you can also save speed by rendering to a 1 channel only texture for part 1.

-Mike-

Btw, rendering into a screen much larger than say 1440x900 is LETHAL to framerate, especially when rendering color (you can get away with about twice the size if you use a shadow map texture with colorwriteenable set to false) This is mainly because most current hardware is not set up to handle this many pixels at once and must parce the rendering job out over additional passes automatically in run time.

I had this filter idea in mind for some weeks now through one of my courses in which we discussed image filtering. Can you show some comparison screens? The problem I see are not just depth edges but texture based sharp lines, too.

That's not true, the view uses a false 3d plane to render from, and since you can do ppes by using and editing the render buffer then you would be able to make anti-aliasing the same way you could anything else.

and how should that work?