Hi, This is more of an observation than a question, but I notice that when I have a scene file with a MASH network whether it be a mesh distribution , placer node, whatever and I have exported and created standins on a Mac running Maya 2018.6 and open the scene on a PC running the same version of Maya and Arnold (MtoA 3.1.2.1) btw, the standins do not render properly. I have to go back and re-export and link the new .ass files in the file/frame path in the Arnold aiStandinShape node. I don;t know if this is a bug, maybe someone else has experienced this issue but it needs to be looked into.
Isn't it because the path names are different on Mac/PC?
I may have overlooked the search path tab and adding relative paths. disabling absolute in render settings. That might work.