Maniphest T85119

Grease Pencil Glow FX not rendering to image if use Film transparent option
Closed, Duplicate
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Assigned To
None
Authored By
Malcolm Reed (mal_reed)
Jan 27 2021, 6:12 PM
Tags
  • BF Blender
  • Grease Pencil
  • Render Pipeline
Subscribers
Antonio Vazquez (antoniov)
Clément Foucault (fclem)
Malcolm Reed (mal_reed)

Description

System Information
Operating system: Windows-10-10.0.19041-SP0 64 Bits
Graphics card: GeForce RTX 2070 SUPER/PCIe/SSE2 NVIDIA Corporation 4.5.0 NVIDIA 456.71

Blender Version
Broken: version: 2.91.2, branch: master, commit date: 2021-01-19 16:15, hash: rB5be9ef417703

Short description of error
I can only see the glow FX in the Render Result window. If rendering to an image sequence using Ctrl F12 or still image via python using write_still=True, there is no glow effect.

Exact steps for others to reproduce the error
Open the attached Blend file
Check the render output path.
Set the Viewport to Rendered (to check the glow is working).
Press Ctrl F12 to render the 2 frame sequence.
Compare the file on disk to the Render Result image.

If the the result is consistent, you'll notice the glow is missing from the files on disk.

GlowDoesntRender.blend6 MBDownload

The result image doesn't export glow effect if the Film option is set to transparent.

Event Timeline

Malcolm Reed (mal_reed) created this task.Jan 27 2021, 6:12 PM
Antonio Vazquez (antoniov) changed the task status from Needs Triage to Confirmed.Jan 28 2021, 1:36 PM
Antonio Vazquez (antoniov) added subscribers: Clément Foucault (fclem), Antonio Vazquez (antoniov).

@Clément Foucault (fclem) I have seen the problem is only if you set the Fill render to transparent.

Antonio Vazquez (antoniov) renamed this task from Grease Pencil Glow FX not rendering to image sequence (Ctrl F12) or still image via python using write_still=True to Grease Pencil Glow FX not rendering to image sequence (Ctrl F12) if use Film,transparent.Jan 28 2021, 1:36 PM
Antonio Vazquez (antoniov) renamed this task from Grease Pencil Glow FX not rendering to image sequence (Ctrl F12) if use Film,transparent to Grease Pencil Glow FX not rendering to image if use Film,transparent.
Antonio Vazquez (antoniov) renamed this task from Grease Pencil Glow FX not rendering to image if use Film,transparent to Grease Pencil Glow FX not rendering to image if use Film transparent option.
Antonio Vazquez (antoniov) added projects: Grease Pencil, Render Pipeline.
Antonio Vazquez (antoniov) updated the task description.
Clément Foucault (fclem) added a comment.Feb 2 2021, 4:39 PM

In short: This is a limitation of the PNG format. Use EXR instead.

Clément Foucault (fclem) closed this task as a duplicate of T81199: Some effects [bloom, smoke, fire, ..] still don't save in PNG with transparent background (occlusion vs. emission).Feb 2 2021, 4:43 PM