Karma Shadow Matte

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Is It possible to render shadow matte pass with Karma?
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I tried with Houdini18.5.408, it seems not working.
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Staff
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Hi. Karma does not yet support shadow matte or have a shadow catcher. As a workaround you could output shadowed and unshadowed AOVs and take the difference to generate a shadow pass in comp.
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dlee
Hi. Karma does not yet support shadow matte or have a shadow catcher. As a workaround you could output shadowed and unshadowed AOVs and take the difference to generate a shadow pass in comp.
Still no solution in 19.5?
What's the holdup?
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OneBigTree
Still no solution in 19.5?
What's the holdup?
I personally haven't used Karma much, but there is this since 19
https://www.sidefx.com/docs/houdini/nodes/lop/backgroundplate.html [www.sidefx.com]

Does it not provide AOVs you are after?
Tomas Slancik
FX Supervisor
Method Studios, NY
protozoan
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It has worked for me before (with some small caveats), if you use the holdout LOP, connect its second output to the second input of the karmarendersettings lop in question and then hook on the "Import render vars from second input" on the Image Output - AOVs tab of the karmarendersettings.
*Edit: "Before" as in: earlier today, on build .387
Edited by protozoan - Oct. 3, 2022 14:56:19
Martin Winkler
money man at Alarmstart Germany
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