Check out Alexandre Canario’s approach to vellum hair in Houdini.
Alexandre Canario shared a final result of creating a vellum hair and showed the normals he created to make the hair simulation and its motion look realistic.
Alexandre Canario is a VFX artist, who focuses on Houdini workflow and has worked on a number of commercials, check out his Vimeo profile for more videos.
You might also be interested in a trick that VFXArabia shared not a long time ago on how to get a higher resolution of simulated vellum hair. For instance, he created 350 strands only and then increased the number to 1500. Check the article on it here.