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You can instantiate meshes and models.
The per-point attributes (like the color in the case below) are exported as constant data for each instanced object.
The per-strand-point attributes are exported as varying data (one value per curves point) only for plain curves nodes.

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The strand orientation attribute, if available, is used:

  • In the case of a shape, to twirl the shape around the strand.
  • In the case of a plain curves node, to set the curves orientation of the curve. To do so, apply an Arnold Parameters property to the pointcloudpoint cloud, and set the Curves Mode to Oriented Ribbon (ICE Strands).
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More information can be found here: Hair / curve parametersHair Tutorial.