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Inverted alpha when rendering in workbench
Closed, ResolvedPublicBUG

Description

System Information
Operating system: Windows-10-10.0.18362-SP0 64 Bits
Graphics card: GeForce GTX 1060 6GB/PCIe/SSE2 NVIDIA Corporation 4.5.0 NVIDIA 452.06

Blender Version
Broken:
2.90.0, branch: master, commit date: 2020-08-31 11:26, hash: rB0330d1af29c0
2.83.5 LTS, branch: master, commit date: 2020-08-19 06:07, hash: c2b144df395f
2.83.0 LTS, branch: master, commit date: 2020-06-03 14:38, hash: 211b6c29f771

Worked:
2.82a, branch: master, commit date: 2020-03-12 05:06, hash: 375c7dc4caf4

Short description of error
Alpha is inverted when rendering with workbench. Both when using alpha values from material properties and when alpha from object properties.

Exact steps for others to reproduce the error

1 Switch to workbench render engine
2 Add alpha from material or object properties
3 Render image and observe incorrect transparency values

Demo files with bug below:

Alpha from material properties:


Alpha from object properties:


Correct render results from 2.82a: