Baking ambient occlusion to vertex colors produces black spots #85057

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opened 2 years ago by tomsmalley · 5 comments

System Information
Operating system: macOS / Windows 10
Graphics card: Intel iris / RX 580

Blender Version
Broken: 2.92 beta

Short description of error
When baking AO to vertex colors, it can produce odd black spots where there clearly shouldn't be. From inspecting the mesh, it seems fine (and render preview seems good). Moving the mesh upwards in Z and then baking seems to fix the issue, but it reappears if I move it back down and bake again.

Exact steps for others to reproduce the error
See the attached blend file. Bake AO to vertex colors and view the layer in solid mode. rally-school-ao.blend

**System Information** Operating system: macOS / Windows 10 Graphics card: Intel iris / RX 580 **Blender Version** Broken: 2.92 beta **Short description of error** When baking AO to vertex colors, it can produce odd black spots where there clearly shouldn't be. From inspecting the mesh, it seems fine (and render preview seems good). Moving the mesh upwards in Z and then baking seems to fix the issue, but it reappears if I move it back down and bake again. **Exact steps for others to reproduce the error** See the attached blend file. Bake AO to vertex colors and view the layer in solid mode. [rally-school-ao.blend](https://archive.blender.org/developer/F9597463/rally-school-ao.blend)
Poster

Added subscriber: @tomsmalley

Added subscriber: @tomsmalley
Collaborator

Added subscriber: @lichtwerk

Added subscriber: @lichtwerk
Collaborator

Can confirm, but unfortunately, this is the same as #75469 (AO shader artifacts).
Please have a read there regarding workarounds [that you already discovered partially], but also for the longterm solution (D6250).

Can confirm, but unfortunately, this is the same as #75469 (AO shader artifacts). Please have a read there regarding workarounds [that you already discovered partially], but also for the longterm solution ([D6250](https://archive.blender.org/developer/D6250)).
Collaborator

Closed as duplicate of #75469

Closed as duplicate of #75469
lichtwerk closed this issue 2 years ago

Added subscriber: @JanKaderabek

Added subscriber: @JanKaderabek
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Reference: blender/blender#85057
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