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Keying node bug
Confirmed, NormalPublicBUG

Description

System Information
Operating system: Linux-5.8.6-1-MANJARO-x86_64-with-glibc2.32 64 Bits
Graphics card: AMD VERDE (DRM 2.50.0, 5.8.6-1-MANJARO, LLVM 10.0.1) X.Org 4.5 (Core Profile) Mesa 20.1.7

Blender Version
Broken: version: 2.91.0 Alpha, branch: master, commit date: 2020-09-13 09:15, hash: rBf5ccf8727f30
Worked: 2.90

Short description of error
Keying node alpha channel is not taken into account 100% when rendering.

On attached file:
2.90: background keyed out (not perfect because I left everything else on defaults)
2.91 alpha: background looks desaturated semi-transparent

Exact steps for others to reproduce the error

or

  • Open attached file
  • F12 render

Event Timeline

Georg K (georg) updated the task description. (Show Details)
Germano Cavalcante (mano-wii) changed the task status from Needs Triage to Confirmed.Tue, Sep 15, 7:45 PM
Germano Cavalcante (mano-wii) updated the task description. (Show Details)
Germano Cavalcante (mano-wii) changed the subtype of this task from "Report" to "Bug".Tue, Sep 15, 7:47 PM

It is indeed a regression.
@Jeroen Bakker (jbakker), I wonder if it has anything to do with the recent changes in the image editor.

Georg K (georg) added a comment.EditedThu, Sep 17, 10:38 PM

Backdrop rendering looks normal in version: 2.91.0 Alpha, branch: master, commit date: 2020-09-17 20:18, hash: rB9ee588cd4af8, but F12 rendering still has artifacts.