dear jeordanis,
thanks so much, i was trying to pipe in color into the userdatacolor node, no wonder it's not working.
i was trying on 2018 and it's working great. then i tried to render in 2020 (using the same file built in maya 2018), the hair doesn't show up in arnold. i am using mtoa 5.2.0 and maya 2020.4, ornatrix version 3.3.8.30738, there is an error in the output window:
00:00:02 1350MB WARNING | [mtoa] Error loading extension library: The specified procedure could not be found.
00:00:02 1350MB ERROR | [mtoa] Call to initializeExtension failed on extension library OrnatrixTranslator4.2(C:/Program Files/Ephere/OrnatrixMaya2020/plug-ins/extensions/OrnatrixTranslator4.2.dll).
i tried to follow the troubleshoot steps from your site and can't edit the Ornatrix.mod file. in the ornatrix 2018 version folder, the extensions are basically same execpt for the 2018 and 2022.
thanks so much in advance.
best,
Charles