Here is an example of exporting Ri Attributes (e.g. Ri Round Curve) to an Alembic File for reading into RenderMan for Maya (RfM), which expects rman__ and not ri_ as Houdini has historically used.
- Add an AttributeCreate node.
- Name it as how it is named in RenderMan for Maya, e.g. rman__riattr__dice_roundcurve
- Set the Class to Detail
- Set the Value expression to the Ri Attribute (e.g. ri_roundcurve)
You can download this example here: curves_alembicattr.hip
When you read the alembic file into RfM, you will see the Round Curve attribute with the setting from Houdini.