Hi!
See attached blend. (Render, and view in compositor viewer node)
If you turn AA off in the render panels the result is as desired.
If you turn AA on, the Z-Buffer should not be affected. Still it seems there are some strange AA related artifacts at the edges.
I noticed, that when you delete the background plane, the edge artifacts disapear.
cheers,
alex
r33205 win7 64, ati hd4850
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Zbuffers can by-definition not be anti-aliased. You can't average depth values, like colors.
That causes this error, and is why FSA was added. :)
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Hi Ton.
I know Z-Buffers cant be Antialiased. This is not why i filed the report. Please see attached image for artifacts in the z-Buffer.
When rendering the Z-Buffer WITHOUT AA turned on in the render preferences, these artifacts dont appear. This makes me wonder, why the Z-Buffer seems to get artifacts when having AA on, although it shouldnt be affected by AA at all.
hope i made myself clear.
cheers
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Obviously without AA you don't get errors. That is what FSA does, it renders 8 x "without AA" and accumulates the result.
The artefacts are because the colors (pixels) get AA'ed but the zbuffer not.
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ok, i didnt know the z-buf is dependant on actual AA settings.
I would have thought it stayed the same no matter what AA setting one choses.
FSA is great of course, but i cant use the samples from FSA in external comp apps.
anyways, keep it up ;-)
cheers.
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Ehh, The z-buf does NOT depend on AA setting, it is always just a single sample. If you render with AA the z-values of the last sub-pixel are being stored.