Inverted alpha when rendering in workbench #80603

Closed
opened 2020-09-08 18:30:14 +02:00 by Format64 · 8 comments

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: 0330d1af29
2.83.5 LTS, branch: master, commit date: 2020-08-19 06:07, hash: c2b144df39
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: 375c7dc4ca

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:
bug_alpha_from_material_properties_01.png
bug_alpha_from_material_properties.blend

Alpha from object properties:
bug_alpha_from_object_properties_01.png
bug_alpha_from_object_properties.blend

Correct render results from 2.82a:
bug_alpha_from_material_properties_02.png
bug_alpha_from_object_properties_02.png

**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: `0330d1af29` 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: ![bug_alpha_from_material_properties_01.png](https://archive.blender.org/developer/F8854886/bug_alpha_from_material_properties_01.png) [bug_alpha_from_material_properties.blend](https://archive.blender.org/developer/F8854888/bug_alpha_from_material_properties.blend) Alpha from object properties: ![bug_alpha_from_object_properties_01.png](https://archive.blender.org/developer/F8854892/bug_alpha_from_object_properties_01.png) [bug_alpha_from_object_properties.blend](https://archive.blender.org/developer/F8854896/bug_alpha_from_object_properties.blend) Correct render results from 2.82a: ![bug_alpha_from_material_properties_02.png](https://archive.blender.org/developer/F8855095/bug_alpha_from_material_properties_02.png) ![bug_alpha_from_object_properties_02.png](https://archive.blender.org/developer/F8855097/bug_alpha_from_object_properties_02.png)
Author

Added subscriber: @Format64

Added subscriber: @Format64

#79085 was marked as duplicate of this issue

#79085 was marked as duplicate of this issue

Changed status from 'Needs Triage' to: 'Confirmed'

Changed status from 'Needs Triage' to: 'Confirmed'

Added subscriber: @mano-wii

Added subscriber: @mano-wii

This issue was referenced by ecfbc5fb55

This issue was referenced by ecfbc5fb55d5035a5ac5f100801559d57ef156e3

Changed status from 'Confirmed' to: 'Resolved'

Changed status from 'Confirmed' to: 'Resolved'
Clément Foucault self-assigned this 2020-09-14 01:10:51 +02:00

Added subscribers: @danieldacostabeyuma, @forestkatsch

Added subscribers: @danieldacostabeyuma, @forestkatsch

This issue was referenced by 0f928c5841

This issue was referenced by 0f928c5841671e119ad34c04cad5afc567414720
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Reference: blender/blender#80603
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