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Can't use Cd attribute from Houdini in Cinema4D Arnold

Message 1 of 5
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Can't use Cd attribute from Houdini in Cinema4D Arnold

Hello everyone,
I was trying to render my object inside Cinema4D with Arnold but I don't know why attribute Cd doesn't work. How can I fix this?
Thank you
Annotation 2022-05-16 135042.jpgAnnotation 2022-05-16 1350242.jpg
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Message 2 of 5

Is the Cd attribute even there? Check the Geometry Spreadsheet in Houdini.
If you export to ASS instead of ABC, is it in there?

// Stephen Blair
// Arnold Renderer Support
Message 3 of 5

Yes I checked that, attribute Cd is there, I also tested the object in blender, cycles can read attribute Cd.
I don't have Arnold for Houdini so I don't have access to .Ass file and Arnold properties inside Houdini, there's no way to do this with .ABC file ?
Message 4 of 5

If you load the Alembic file via the native loader, then the attributes are added as vertex maps. Use the vertex map shader to read them (or try vmap_Cd in the user data shader).


Alternatively you can use the Arnold Procedural node instead, which reads the attributes are user parameters, and you can use the user_data shader as in your screenshot. This method has the advantage of loading the geometry in render-time, and keeps your scene light.

// Peter Horvath
// C4DtoA developer
Message 5 of 5

Loading geometry with Arnold procedural node worked perfectly, thank you so much.

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