Anti-aliasing not working properly with old grease pencil files (2.80 to 2.82) on Blender 2.83 #74938
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Reference: blender/blender#74938
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System Information
Operating system: Windows-10-10.0.18362-SP0 64 Bits
Graphics card: GeForce GTX 970/PCIe/SSE2 NVIDIA Corporation 4.5.0 NVIDIA 432.00
Blender Version
Broken: version: 2.83 (sub 10), branch: master, commit date: 2020-03-19 13:43, hash:
42012493a8Short description of error
In Blender 2.83, when rendering a project containing a grease pencil drawing initially made with blender 2.82, the anti-aliasing seems to work randomly.
Maybe related: if you add a grease pencil monkey, remove all light in the scene and render, the anti-aliasing seems to be deactivated and behave like in the picture below.
Exact steps for others to reproduce the error
Open attached file then render.
{F8416374 size=full}
bug_clean.blend
Added subscriber: @(Deleted)
#74950 was marked as duplicate of this issue
Added subscriber: @EitanSomething
I am unable to reproduce. Can you update your drivers and see if it makes a difference. https://www.nvidia.com/Download/index.aspx
Changed status from 'Needs Triage' to: 'Needs User Info'
Added subscriber: @samvila
Added subscriber: @ankitm
GTX strikes again.
Rendered with updated drivers (Nvidia v. 442.74). AA is still inconsistent.
Changed status from 'Needs User Info' to: 'Needs Triage'
Added subscribers: @fclem, @antoniov
Changed status from 'Needs Triage' to: 'Confirmed'
I can confirm on Windows RTX2080TI (last drivers). Also I have seen that some areas have antialiasing and others no.
@fclem Any idea here?
I can reproduce on AMD.
This is unfortunately a limitation of the new Antialiasing of GPencil. We use scene refered colors (before exposure and color management) to perform the edge detection and there a threshold for that.
We could have a parameter to adjust the threshold per scene. But increasing it will lead to blurrier textures when they are used.
@fclem Could consider this as a Know Issue?
@fclem What to do with this report?
This is important. I think we should add a slider to increase the threshold.
Fixed with commit
f24e9bb038Changed status from 'Confirmed' to: 'Resolved'
Example output:
New parameter: