Grease Pencil modifier "line art" won't draw objects with Geometry Nodes Instances. #98424
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Reference: blender/blender#98424
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System Information
Operating system: Windows-10-10.0.19044-SP0 64 Bits
Graphics card: NVIDIA GeForce RTX 2070 with Max-Q Design/PCIe/SSE2 NVIDIA Corporation 4.5.0 NVIDIA 471.96
Blender Version
Broken: version: 3.3.0 Alpha, branch: master, commit date: 2022-05-25 21:21, hash:
dc6fe73e70
Worked: Blender 3.2
Short description of error
Grease Pencil modifier "line art" won't draw objects with Geometry Nodes Instances.
Exact steps for others to reproduce the error
Thanks for looking into it.
Added subscriber: @LucianoMunoz
Added subscriber: @frogstomp-4
@LucianoMunoz try adding "realize instances" node before output
Yes that works, thanks !
but that's not the point tho. :)
@LucianoMunoz this is expected behaviour. You need to use realize instances also if you want to use modifiers on geometry nodes outputs.
Bevel modifier in this case would not produce any effect if you didn't use realize instances.
Added subscribers: @ChengduLittleA, @OmarEmaraDev
Changed status from 'Needs Triage' to: 'Confirmed'
@ChengduLittleA Not sure if this is due to a change in LineArt or GN? Let me know if you want me to bisect.
@frogstomp-4 I think the point is that it used to work up until recently, so it is not an intrinsic limitation.
Hi! This is due to a recent change in how line art loads objects (which is still wrong but we don't have a viable way in terms of depsgraph usage, basically we can't actually iterate objects and instance during line art evaluation). I'm not that familiar with depsgraph to present a very solid solution for it, but there will be a solution to come.
I actually want to revert back to the original object iterator since that's how line art has been doing stuff all this time, though it's incorrect and theoretically could cause access conflicts in depsgraph, we actually didn't have any(?) bug reports regarding line art crashes that's determined to be caused by this, and I myself haven't experienced this sort of crashes either (which is probably why I or GP guys never knew the way we are doing stuff is technically wrong).