Cryptomatte - Arnold for Houdini
| Further Reading |
| Cryptomatte in the Arnold User Guide for the full shader documentation. |
Arnold supports cryptomatte, an ID matte creation tool created by Jonah Friedman. It creates ID mattes automatically with support for motion blur, transparency, and depth of field.
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| Cryptomatte shader available in Shop> Arnold Vopnet |
- Create an OUT_AOV node and connect your Cryptomatte node to it.
- Connect a cryptomatte shader to AOV shaders in the Arnold ROP (Properties > Output tab).
- Render the Cryptomatte AOVs to disk (as EXR).
- Opening the EXR in a compositing package such as Nuke or Fusion shows the available cryptomatte AOVs.
Note:
There is a limitation with the current cryptomatte implementation, where object names are expected to follow the MtoA naming convention. A workaround is to manually set the " crypto_asset " string attribute on the geometry you want to belong to the same asset ID, which works.
