Testing Vray 5 Beta with 3dsMax 2021 I’m trying out Vray 5 Beta with 3dsMax 2021. I like the new IPR an it works great with Tyflow. The Tyflow setup is super simple, just a surface force motion driven by a basic noise texture. The material is simple too. I turned on Abbe number on an set the value to 1.0 to get some nice dispersion.