Issues with karma cryptomatte and import in cops

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Hey!

Back again with more issues with cops/karma.
I can't access correclty my cryptomattes from karma in cops and can't find information about it elsewhere.



And is it normal my differents cryptomattes layers look like this, why not just two black&white layers with an object each ?




And is it possible to make a mask aov for only one object in the scene, without cryptomatte ?

Thanks !
Edited by kentin - 2023年3月13日 14:15:19

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332950763_112297565127183_2357218794690431613_n.jpg (84.1 KB)
332903965_907745777093690_7129193789753277737_n.jpg (137.3 KB)

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kentin
I can't access correclty my cryptomattes from karma in cops and can't find information about it elsewhere.
Did you try following the instructions on the Cryptomatte COP seen in your screenshot? Left click in comp viewer to pick your selection

kentin
And is it normal my differents cryptomattes layers look like this, why not just two black&white layers with an object each ?
Yes, it is normal, Cryptomatte is able to encode many elements and contributions of multiple different elements per pixel that way

If you have just 2 elements if may seem unnecessary to have empty layers, but with hundreds of elements you will be happy it just uses 3 layers
Edited by tamte - 2023年3月13日 15:40:21
Tomas Slancik
FX Supervisor
Method Studios, NY
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Ooooh ok, I didn't knwow the comp view was a window!
Now I know what to write ^^
Thanks !
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Hmm,
My mask look very weird in fact.
Do you have an idea ?
Edited by kentin - 2023年3月13日 17:27:33

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Oak_a1n1c_Billboards_mask.png (141.2 KB)

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Hi. Are you referring to the checkerboard appearance? RGB channels are only for preview and uses checkerboard to indicate selection. Alpha channel contains the output mask. Please see https://www.sidefx.com/docs/houdini/nodes/cop2/cryptomatte.html [www.sidefx.com] for more detail.
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