How to read hair point attribute in Redshift

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I tried to use RSUserDataScalar, ParticleAttributeLookup and some other nodes to read a point attribute when rendering hair, but it always shows black, only primitive attribute works.
When rendering object as strands, It can read point attributes, but the rendering result isn't as good as hair.

render polygons as hair, used rs hair color nodes

render object as strands, have Cd point attribute

strand point attribute
Edited by robinrainup - Dec. 5, 2021 20:49:05

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