EEVEE Ambient Occlusion on Custom Normals has visible faces #96358

New Issue

Pavel Duong · 2022-03-12T02:52:09+01:00

Pavel Duong commented

2022-03-12 02:52:09 +01:00

System Information
Operating system: Arch Linux and Windows 10
Graphics card: Intel UHD 620 and NVIDIA GTX 1060 Super

Blender Version
Broken: 0781c22cee, 2.80
Worked:

Short description of error

Enabling AO while having a model with custom normals will in most cases exhibit visible faces.

Exact steps for others to reproduce the error
Based on the default startup or an attached .blend file (as simple as possible).

Create a Sussane
Add Subsurf. modifier and Normal Edit with locking polygon normals (lock next to Max Angle)
Enable Rendered/LookDev mode with AO enabled
Notice visible faces on the ears

bug_report.blend

**System Information** Operating system: Arch Linux and Windows 10 Graphics card: Intel UHD 620 and NVIDIA GTX 1060 Super **Blender Version** Broken: 0781c22ceedc, 2.80 Worked: **Short description of error** ![Screenshot from 2022-03-12 02-43-32.png](https://archive.blender.org/developer/F12922432/Screenshot_from_2022-03-12_02-43-32.png) Enabling AO while having a model with custom normals will in most cases exhibit visible faces. **Exact steps for others to reproduce the error** Based on the default startup or an attached .blend file (as simple as possible). 1. Create a Sussane 2. Add Subsurf. modifier and Normal Edit with locking polygon normals (lock next to Max Angle) 3. Enable Rendered/LookDev mode with AO enabled 4. Notice visible faces on the ears [bug_report.blend](https://archive.blender.org/developer/F12922439/bug_report.blend)

Pavel Duong commented

2022-03-12 02:52:09 +01:00

Added subscriber: @vignette

Pratik Borhade commented

2022-03-12 13:38:57 +01:00

Added subscriber: @PratikPB2123

Pratik Borhade commented

2022-03-12 13:38:57 +01:00

If I'm not mistaken this is the same issue as reported in #89575 (Regression: Ambient Occlusion causes shading artifacts)
Will close this as duplicate. Thanks for the report :)

Don't hesitate to comment if there is misunderstanding. I'll reopen the report in that case.

If I'm not mistaken this is the same issue as reported in #89575 (Regression: Ambient Occlusion causes shading artifacts) Will close this as duplicate. Thanks for the report :) Don't hesitate to comment if there is misunderstanding. I'll reopen the report in that case.

Pratik Borhade commented

2022-03-12 13:39:11 +01:00

Closed as duplicate of #89575

Pratik Borhade closed this issue

2022-03-12 13:39:11 +01:00

Pavel Duong commented

2022-03-12 20:42:06 +01:00

I've taken a look at the other issue and compared them. It is in my opinion a different problem for various reasons.

Faces are visible regardless whether Alpha Blend is enabled (although different severities)
Faces are visible regardless whether Bent Normals are enabled
Issue is still prelevant (although looks a bit different) on 2.80

Not sure if internally it points towards the same issue though, but on surface level it appears to be a different bug.

I've taken a look at the other issue and compared them. It is in my opinion a different problem for various reasons. 1. Faces are visible regardless whether Alpha Blend is enabled (although different severities) 2. Faces are visible regardless whether Bent Normals are enabled 3. Issue is still prelevant (although looks a bit different) on 2.80 Not sure if internally it points towards the same issue though, but on surface level it appears to be a different bug.

Dmitry C. referenced this issue

2024-04-21 12:32:28 +02:00

Regression: EEVEE ambient occlusion artefact with HDRI lighting at long viewing distances #120872

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EEVEE Ambient Occlusion on Custom Normals has visible faces #96358