Blending Vertex Color when baking to it on UV seams (Bug or missing feature) #84663

New Issue

Wojciech Klimas · 2021-01-13T09:54:52+01:00

Wojciech Klimas commented

2021-01-13 09:54:52 +01:00

System Information
Operating system: Windows 10
Graphics card: GeForce GTX 1070 Driver 461.09

Blender Version
Broken: version: 2.92.0 Alpha, branch: master, commit date: 2021-01-13 00:18, hash: 719bea0d6d
Worked: The last time we had bake to vertex color - 2.79

Short description of error
One of the most useful features of 2.79 bake to vetex color is missing/broken - not blending colors when baking from texture on UV seams
Here's the example in 2.79:

And the same thing in 2.92

In both screens viewport shows baked Vertex Color

Added test .blend file
Bake_Test.blend

System Information Operating system: Windows 10 Graphics card: GeForce GTX 1070 Driver 461.09 Blender Version Broken: version: 2.92.0 Alpha, branch: master, commit date: 2021-01-13 00:18, hash: 719bea0d6d06 Worked: The last time we had bake to vertex color - 2.79 Short description of error One of the most useful features of 2.79 bake to vetex color is missing/broken - not blending colors when baking from texture on UV seams Here's the example in 2.79: ![bake_2_79.JPG](https://archive.blender.org/developer/F9562679/bake_2_79.JPG) And the same thing in 2.92 ![Bake_2_92.JPG](https://archive.blender.org/developer/F9562682/Bake_2_92.JPG) In both screens viewport shows baked Vertex Color --------------------------------------------- Added test .blend file [Bake_Test.blend](https://archive.blender.org/developer/F9577678/Bake_Test.blend)

Wojciech Klimas commented

2021-01-13 09:54:52 +01:00

Added subscriber: @WojciechKlimas

blender-admin commented

2021-01-13 09:54:52 +01:00

#85160 was marked as duplicate of this issue

Falk David commented

2021-01-13 14:23:35 +01:00

Added subscriber: @filedescriptor

Falk David commented

2021-01-13 14:23:35 +01:00

Changed status from 'Needs Triage' to: 'Needs User Info'

Falk David commented

2021-01-13 14:23:35 +01:00

This report does not contain the requested information, which is required for us to investigate the issue. Please read this guide , it may help you write a bug report that allows us to fix your problem.

If you want to report a bug in Blender:

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Use Help > Report a Bug.
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This report does not contain the requested information, which is required for us to investigate the issue. Please read [this guide ](https://wiki.blender.org/wiki/User:Rjg/HowToBugReport), it may help you write a bug report that allows us to fix your problem. If you want to report a bug in Blender: - Open Blender. - Use Help > Report a Bug. - Add which versions of Blender do not work. - Add which version of Blender works.

Falk David commented

2021-01-13 14:44:18 +01:00

Thank you for updating the report. Could you share the .blend file used in the screenshot as well? You can just drag & drop it into the textbox when editing the task.

Falk David commented

2021-01-15 17:12:13 +01:00

Changed status from 'Needs User Info' to: 'Needs Triage'

Philipp Oeser commented

2021-01-21 15:28:44 +01:00

Added subscriber: @lichtwerk

Philipp Oeser commented

2021-01-21 15:28:44 +01:00

Changed status from 'Needs Triage' to: 'Needs Developer To Reproduce'

Philipp Oeser commented

2021-01-21 15:28:44 +01:00

Can confirm the difference between 2.7 and 2.92.

Looks like this is close to a "Known Limitation" atm., found this comment from 2221389d6e:

/* Byte loop colors in sRGB colors space.
 *
 * Note that colors have been baked per vertex and not per corner, which
 * could be useful to preserve material discontinuities. However this also
 * leads to unintended discontinuities due to sampling noise. */

So this might indeed be a missing feature (also unsure if this justifies adding an option for this?)
The Render & Cycles module will have to classify.

Can confirm the difference between 2.7 and 2.92. Looks like this is close to a "Known Limitation" atm., found this comment from 2221389d6e: > /* Byte loop colors in sRGB colors space. > * > * Note that colors have been baked per vertex and not per corner, which > * could be useful to preserve material discontinuities. However this also > * leads to unintended discontinuities due to sampling noise. */ So this might indeed be a missing feature (also unsure if this justifies adding an option for this?) The `Render & Cycles` module will have to classify.

Philipp Oeser commented

2021-02-01 09:43:38 +01:00

Added subscribers: @thomason1005, @mano-wii, @brecht