Artifacts appear in texture bakes [stripe pattern] #81710
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Reference: blender/blender#81710
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System Information
Operating system: Windows 10 Pro 64-bit
CPU: i7 4790
Graphics card: GTX 1050
Blender Version
Broken: Every Blender Build on this PC, Baking.
Worked: never
Short description of error
Weird artifacts appear in bakes, especially visible in the AO bakes (see attached images)
Exact steps for others to reproduce the error
AOArtifacts_Test.blend
BakeAdded subscriber: @nevermoregraphics
#93887 was marked as duplicate of this issue
#92078 was marked as duplicate of this issue
Added subscriber: @StephenSwaney
Changed status from 'Needs Triage' to: 'Needs User Info'
As Einstein has demonstrated, the meaning of "past" depends on your velocity, so it would help to know exactly which version of Blender you are using. I recommend trying the daily build for your platform.
See https://builder.blender.org/download/
To reproduce this, a .blend is needed. Especially since this:
makes it sound like there might be an issue with geometry.
Thank you for the answer.
UPDATE: Ok, so I just logged out of Windows, and executed that same series of tasks from Ubuntu. Same set of errors appeared. I also did a series of tests involving simpler geometry, which did NOT exhibit the same patterns, but I was using primitives. I also tested with 2048 and 1024 resolutions, and the artifacts didn't go away. I attached an example .BLEND file for you to test. This file bakes the artifacts shown above. Thanks again for your time.
AOArtifacts_Test.blend
Added subscriber: @MarcinTwarowski
Indedd, baked texture has artifacts that do not appear in real time AO shader. AO baking doesn't seem to do well with long polygons. Adding edge loops helped to reduce artifacts in baked texture:
So it's not just on MY rig/software. That's a relief. Come to think of it, this all started when I started working on low-poly geometry for videogames. These artifacts appear on other types of bakes as well, such as diffuse:
They do not appear on normal bakes. Is there a way to submit a request to fix this bug? Or to whom or where? I'm sure the dev team has their priorities, but I'd like them to consider this one.
Changed status from 'Needs User Info' to: 'Needs Triage'
Added subscriber: @lichtwerk
Changed status from 'Needs Triage' to: 'Confirmed'
Will confirm for now.
This might be a Known Issue, but I would not know the cause/reason of these stripes.
That is not true though
Horrible artifacts appear in bakes, making them useless.to Artifacts appear in texture bakes [stripe pattern]does it appear in each one of them? I have noticed it only after 2.80, you might be right, I had no idea it was there all along.
Added subscriber: @brecht
It's a problem with long thin triangles, the workaround is to add a few loopcuts.
Perhaps the ray differential in baking have some precision issue.
Added subscribers: @cheteron, @PratikPB2123
Forgot about this post until today's notification.
There seems to be a problem with long polygons. Yes. And yes, I neglected to notice this issue but I have since downloaded several Blender builds up to 2.70 and they all exhibit this issue, don't know why I haven't noticed it earlier. Only work around is to add loop cuts to bake, then get rid of them after baking, for polygon economy.
Added subscriber: @Koniotaur
Added subscriber: @deadpin
I can confirm that adding extra loops for bake time has got rid of the noise. I wish this issue will be tackled somewhat soon so that we don't have to do the workaround.
Added subscriber: @lictex_1