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Maniphest T73767

ambient occlusion and shade smooth
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Description

System Information
Operating system: Windows-10-10.0.18362-SP0 64 Bits
Graphics card: GeForce GTX 1080 Ti/PCIe/SSE2 NVIDIA Corporation 4.5.0 NVIDIA 441.87

Blender Version
Broken: version: 2.82 (sub 6), branch: master, commit date: 2020-02-11 13:04, hash: rB3dcddf83bfd4
Worked: (optional)

Short description of error
If u use shade smooth and the note ambient occlusion at the same time u will get a wrong ambient occlusion. I use the cycles renderer. In the image and file u can see this better.

Exact steps for others to reproduce the error

ambient occlusion and shader smooth.blend855 KBDownload

Related Objects

Event Timeline

John (John155) renamed this task from ambient occlusion and shader smooth to ambient occlusion and shade smooth .Feb 12 2020, 9:53 PM
John (John155) created this task.
John (John155) changed the task status from Needs Triage to Needs Information from User.Feb 13 2020, 1:54 PM
Campbell Barton (campbellbarton) changed the task status from Needs Information from User to Needs Triage.EditedFeb 24 2020, 4:02 AM
Campbell Barton (campbellbarton) added a project: Cycles.
Campbell Barton (campbellbarton) added a subscriber: Campbell Barton (campbellbarton).

Confirmed there are some artifacts with AO + smooth shading.

Cycles devs: Is this a known limitation?

Dalai Felinto (dfelinto) added a subscriber: Dalai Felinto (dfelinto).Mar 11 2020, 3:03 PM

@John (John155) please test with previous versions (2.79, 2.81) to better identify when the problem was introduced or if it was always present.

Brecht Van Lommel (brecht) closed this task as Archived.Mar 11 2020, 3:08 PM
Brecht Van Lommel (brecht) claimed this task.
Brecht Van Lommel (brecht) added a subscriber: Brecht Van Lommel (brecht).

We have D6250: Fix T43835, T54284: Cycles with no ray offsetting and T68920: Cycles: improve shadow terminator handling to improve this.

Philipp Oeser (lichtwerk) mentioned this in T75469: AO shader artifacts.Apr 7 2020, 2:18 PM
Philipp Oeser (lichtwerk) mentioned this in T82073: AO node bug.Oct 26 2020, 11:23 AM