Geometry Light in LOPs

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In my test,Karma XPU still won't support geo/volume light.It's normal?
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tamte
sekow
bump, LPE tags for geo lights still a no no?
you can tag geometry with LPE tag and then isolate in your AOVs
it works for geometry light contributions

the main limitation seems to be that the Split Per LPE Tag checkboxes don't parse geometry marked as lights, only light schemas and therefore they will not detect and create the AOVs for current workaroundish incarnation of geometry lights

so you have to create additional AOVs yourself with corresponding LPE that filters lights by LPE tag of the geometry light object

thanks Tomas, should have come up with that on my own, here is the hip for everybody that is interested. But not sure if my LPEs are correct, even if they look alright.

Attachments:
lops_geo_lights_aovs.hip (930.1 KB)

http://www.sekowfx.com [www.sekowfx.com]
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sekow
But not sure if my LPEs are correct, even if they look alright.
If you always want to treat those objects as lights you can just do:
C.*<L.'tubes'>

but I assume your LPE tries to match both cases whether you interpret them as lights or keep as emissive surfaces
C.*[<L.'tubes'>+<O.'tubes'>]

in that case I think you can simplify by typing:
C.*<[LO].'tubes'>
Tomas Slancik
CG Supervisor
Framestore, NY
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Is there a way to control active radius on a geometry light?
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tamte
sekow
But not sure if my LPEs are correct, even if they look alright.
If you always want to treat those objects as lights you can just do:
C.*<L.'tubes'>

but I assume your LPE tries to match both cases whether you interpret them as lights or keep as emissive surfaces
C.*[<L.'tubes'>+<O.'tubes'>]

in that case I think you can simplify by typing:
C.*<[LO].'tubes'>

Thanks! Its really helpful!
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Bump for question about light linker -- is it possible to use Light Linker on geometry lights? I am trying to light link an emissive volume, but it's not showing up at all on the "lights" panel of the light linker...
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nicholasralabate
Bump for question about light linker -- is it possible to use Light Linker on geometry lights? I am trying to light link an emissive volume, but it's not showing up at all on the "lights" panel of the light linker...

Not yet, but in a future release this will be possible, as Geometry Lights in USD are now decorated with an ApiSchema, so USD/Hydra recognize them as actual lights.
Edited by goldleaf - June 10, 2025 18:01:45
I'm o.d.d.
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Awesome! I guess the workaround now is recombining in comp, will stick to that until the ApiSchema recognition feature is added.
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goldleaf
Not yet, but in a future release this will be possible
Good news. Please include it in the Light Mixer as well, thank you.
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