I’m running 3ds Max2018 (not sure why) and when I load some scenes from 2016 the VRayALSurfaceMtl is missing as an option. It was happening when I first started 3ds Max. I deleted my “maxstart.max” file and that fixed it on load but, then I loaded a scene and it was gone again. Thoughts?
Is the VRayALSurfaceMtl missing on a new fresh scene( 3ds Max2018 )as well? I connot seem to reproduce the issue on our side. Is it possible to send us a sample scene?
I figured it out/turned my brain on…the scene had RT enabled instead of Adv. Please disregard 
Thanks!