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Maniphest T84058

Grease pencil edit mode visual bug
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Description

System Information
Operating system: Darwin-19.5.0-x86_64-i386-64bit 64 Bits
Graphics card: AMD Radeon Pro 5500M OpenGL Engine ATI Technologies Inc. 4.1 ATI-3.9.15

Blender Version
Broken: version: 2.92.0 Alpha, branch: master, commit date: 2020-12-21 21:31, hash: rBffacce5be41d
Worked: 2.90

Short description of error
When strokes visually overlap with 3D models in GP edit mode I get this strange effect:


The colors of the parts of the strokes that overlap with the model change with the background color. The doubled stroke seems to project onto the model somehow and moves around depending on camera angle and zoom level. It's fixed when I turn off all overlays, but none of the individual overlay settings affect it. The effect also disappears if I turn on X-ray in the viewport settings and set it to anything less than 1.0.

Screenshot with different viewport color and zoom level:


Something similar happens when editing the model as well:

Related Objects

Event Timeline

Arnold Lynx (ArnoldLynx) created this task.Dec 22 2020, 6:30 PM
Arnold Lynx (ArnoldLynx) added a project: Grease Pencil.
Falk David (filedescriptor) added a project: EEVEE & Viewport.Jan 12 2021, 9:14 AM
Falk David (filedescriptor) added subscribers: Clément Foucault (fclem), Falk David (filedescriptor).

This seems like it's working as expected. It's just how the grease pencil drawing engine currently works. @Clément Foucault (fclem) Does this look unexpected to you?

Philipp Oeser (lichtwerk) added a subscriber: Philipp Oeser (lichtwerk).Feb 9 2021, 1:08 PM

This is due to Fade Inactive Geometry being ON

It has been reported again in T85207: Grease pencil strokes are incorrectly blended with geometry in draw mode (depending on 'Fade Inactive Geometry' setting), will merge these reports (lets continue discussion there -- includes workaround)

Philipp Oeser (lichtwerk) closed this task as a duplicate of T85207: Grease pencil strokes are incorrectly blended with geometry in draw mode (depending on 'Fade Inactive Geometry' setting).Feb 9 2021, 1:08 PM