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Maniphest T87622

Grease Pencil: Fill tool results are inconsistent and often unusable
Confirmed, NormalPublicKNOWN ISSUE
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Description

System Information
Operating system: Windows-10-10.0.18362-SP0 64 Bits
Graphics card: GeForce RTX 2060/PCIe/SSE2 NVIDIA Corporation 4.5.0 NVIDIA 457.30

Blender Version
Broken: version: 2.93.0 Alpha, branch: master, commit date: 2021-04-07 21:03, hash: rBb7b1b2325c1a

Short description of error
Fill tool results are inconsistent over different viewport pan and zoom settings. Can't reliably fill a shape the way i expect.

Video of example. The leftmost leg (the viewer's left, not the character's) is sometimes filled as expected, but most of the time the fill crosses the edge of the shape.
https://youtu.be/hiUHb7ZG0u8

Exact steps for others to reproduce the error

  • open the attached blend
  • try this repeatedly: fill the leftmost leg, undo the fill, adjust panning and/or zooming of the viewport
  • the leg doesn't get filled in a consistent way, most of the time the fill is unusable.

inconsistentfill.blend1 MBDownload

Event Timeline

Tomasz Kaye (bitbutter) created this task.Apr 19 2021, 12:10 PM
Tomasz Kaye (bitbutter) added a project: Grease Pencil.
Falk David (filedescriptor) changed the subtype of this task from "Report" to "Known Issue".Apr 19 2021, 12:29 PM
Falk David (filedescriptor) added a subscriber: Falk David (filedescriptor).

This is a known issue with the current implementation. The fill tool works by grabbing the current frame buffer (basically) and then filling the pixel data of it and finally reprojecting the points of the stroke into 3d space. Ideally, this would work using booleans, but we don't have that yet.

Falk David (filedescriptor) changed the task status from Needs Triage to Confirmed.Apr 19 2021, 12:29 PM
Tomasz Kaye (bitbutter) added a comment.Apr 19 2021, 1:11 PM

ah thanks. i guess i'd gotten lucky before, didn't notice this difficulty.