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Grease pencil attributes added to regular material
Open, Confirmed, LowPublic


System Information
Operating system: linux Mint
Graphics card: Nvidia 1070

Blender Version
Broken: 2.8 4439e5d0ba3f
Worked: (optional)

Short description of error
Grease pecil attributes on regular materials on file load.

Exact steps for others to reproduce the error
Getting grease pencil attributes added on some regular materials on file load.
Allready have such error reported ~10 days ago.



Event Timeline

Christopher Anderssarian (Christopher_Anderssarian) triaged this task as Needs Information from User priority.

If you are talking about the Annotation layers showing up, then that's intended behaviour.
(see T63455: Legacy GPencil settings in Annotations).
Is that what you mean?

Nope, select the object and take a look at material,
you should see typical grease pencil attributes on it, stroke and so on, and i definitely not expect those params on regular material.

Christopher Anderssarian (Christopher_Anderssarian) raised the priority of this task from Needs Information from User to Needs Triage by Developer.

Ah I see...
AttributeError: 'Mesh' object has no attribute 'use_stroke_edit_mode'

@stephen leger (stephen_leger) Any Idea how to reproduce? (from scratch)

@Antonio Vazquez (antoniov) Known issue?

I cannot reproduce it. I have created a file in 2.79 and loaded and all is ok, then created a new file in 2.80, open it again and not problems.

When need a reproducible step by step guide to analyze this bug.

Are you using any add-on?

Don't know how to repro, it suddenly appear on a file after loading.
Looks like it's probably related to Annotation.

Had another user with same issue ~ 29.03.2019

Antonio Vazquez (antoniov) triaged this task as Needs Information from User priority.Apr 18 2019, 7:15 PM

Maybe there was a name conflict when the materials for annotations was created... but not sure. We will wait until you are able to reproduce consistently to go deeper in the problem.

Archipack, is enabled,
but double checked material loading 29.03 and not it does check and when gp attr are found skip material and never apply it.
So i cant imagine it's related to this one.

Root of this issue still not known, but it occurs. It's clearly related to use of annotations.
So maybe keep open with a lower priority in order to gather more information from other users.

At this time it is impossible to remove gp related parameters from materials, so current workaround is to re-create material and related nodes, but would have been lot easyer if we are able to simply remove gp attr.

Ok, we will keep open waiting to get the exact steps to reproduce it.

Bastien Montagne (mont29) lowered the priority of this task from Needs Information from User to Confirmed, Low.May 16 2019, 12:03 PM