Cryptomatte (Compatible with IFFS 2018.1.0 and up)
Cryptomatte - extract up to four mattes from the ID/coverage pairs generated by Arnold/Clarisse/Mantra’s Cryptomatte shaders.
There’s no need for this shader unless using very old Flame versions - since 2020 there’s a built-in node for it: https://help.autodesk.com/view/FLAME/2023/ENU/?guid=GUID-0402116E-B47C-4E32-9010-DB8C334853E0
It’s crucially important to use the floating colour sampler window - pick the colours from the first input, add them to the floating swatches and only then transfer them to the shader controls! Auto Key needs to be off as well. This works in Flame 2018 Update 1 and above. See demo:
http://youtube.com/watch?v=p5D1FRRlplU
lewis _at_ lewissaunders.com
Version notes
updated description of matchbox to note Flame has a builtin node now
Older versions that shader
12th of September 2022
Downloadupdated description of matchbox to note Flame has a builtin node now
4th of June 2017
DownloadThis is a quick working upload of commit 5cfa22896c74150817c3b7a2dc187cbf194afd9d from this branch: https://github.com/lcrs/Cryptomatte/tree/flame
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