For rendering with Vray you can use maps exported from Substance Painter or the Substance plugin in Maya or 3ds Max.
In order to render with Vray 3.6 from Substance Painter's default metal/rough shader, the Substance outputs will need to be converted to inputs that can be used with the Vray material. You will need the following maps:

  • Diffuse
  • Reflection
  • Glossiness
  • 1/IOR

With Vray Next, you can simply export using the default metallic/roughness channels. 

These maps can only be converted from the metallic/roughness workflow which is the default workflow in both Substance Designer and Substance Painter. 

  1. Export maps from Substance Painter using the Vray preset to create the converted maps from metal/rough. 
  2. For custom Substances, you can use the basecolor_metallic_roughness converted node set to the Vray preset to create the custom outputs. 
  3. The current Maya and 3ds Max plugins contain Vray Next render workflows for one-click rendering setup.