Grease Pencil Glow FX not rendering to image if use Film transparent option #85119
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Reference: blender/blender#85119
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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:
5be9ef4177Short 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.blend
The result image doesn't export glow effect if the Film option is set to transparent.
Added subscriber: @reed2000
Added subscribers: @fclem, @antoniov
Changed status from 'Needs Triage' to: 'Confirmed'
@fclem I have seen the problem is only if you set the Fill render to transparent.
Grease Pencil Glow FX not rendering to image sequence (Ctrl F12) or still image via python using write_still=Trueto Grease Pencil Glow FX not rendering to image sequence (Ctrl F12) if use Film,transparentGrease Pencil Glow FX not rendering to image sequence (Ctrl F12) if use Film,transparentto Grease Pencil Glow FX not rendering to image if use Film,transparentGrease Pencil Glow FX not rendering to image if use Film,transparentto Grease Pencil Glow FX not rendering to image if use Film transparent optionIn short: This is a limitation of the PNG format. Use EXR instead.
Closed as duplicate of #81199