Katana 22

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Here is an example of how to set a color user attribute with an OpScript:

gb = GroupBuilder()
gb:set("value", FloatAttribute({0.0, 1.0, 0.0}, 3))
gb:set("type", StringAttribute("color"))
Interface.SetAttr("prmanStatements.attributes.user.myColor", gb:build())


While all user attributes can be set up as a GroupAttribute, color attributes are the only type that requires it.  Int, float, and string user attributes can be set directly, with their type inferred from the Katana attribute type:

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