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GP transparent layer doesn't blend with background object
Confirmed, NormalPublic


System Information
Operating system: Windows-10-10.0.19041-SP0 64 Bits
Graphics card: GeForce RTX 2060/PCIe/SSE2 NVIDIA Corporation 4.5.0 NVIDIA 457.30

Blender Version
Broken: version: 3.0.0 Alpha, branch: master, commit date: 2021-06-18 21:33, hash: rBf9aea19d9890

Short description of error
I have a foreground grease pencil object, and a background grease pencil object (yellow blob).
The foreground object contains a layer set to 0 opacity.
Where this layer overlaps the background object in the viewport, the background object is invisible.
Expected behaviour: the visibility of the background grease pencil object isn't affected by transparent layers in a foreground object.

Exact steps for others to reproduce the error

Foreground object "makes hole" in background, doesn't blend. Rotate viewport camera, suddenly it blends correctly.
When foreground location is set to 0,0,0 it blends correctly too.

Event Timeline

Richard Antalik (ISS) renamed this task from Grease Pencil. Zero opacity fill of foreground object affects visibility of background object to GP transparent layer doesn't blend with background object .Jun 22 2021, 10:07 AM
Richard Antalik (ISS) changed the task status from Needs Triage to Confirmed.
Richard Antalik (ISS) updated the task description. (Show Details)

@Tomasz Kaye (bitbutter) To simplify blend file in general, remove as much data as possible - unused objects, strokes materials and so on. Possibly simplify geometry.