Maya 2016 Extension 2 - VRay for Maya 3.4
The V-Ray material uses a Diffuse, Reflection, Glossiness workflow. In Substance Painter, you have the ability to work with metallic/Roughess or Specular/Glossiness workflows and these shaders are geared towards real-time usage. However, Substance Painter can export textures for use with V-Ray. By using the V-Ray export preset, Substance Painter will export the converted maps needed to work the V-Ray material. It is recommended to work with V-Ray 3.1 and higher in order to use the GGX BRDF, which will more closely match the Substance Painter viewport.
Substance Painter Export
- In your Project go to File / Export Textures...
- In the Export Tab, select the Vray Configuration and click Export.
V-Ray Material Setup
- Create a VRayMtl material
- Import the textures exported from Substance Painter into Maya
Hook up the textures to the input channels as follows...
Substance Painter Texture Colorspace V-Ray Material Channel Diffuse sRGB Diffuse Color Reflection sRGB Reflection Color Glossiness RAW Reflection Glossiness IOR* RAW Fresnel IOR* Normal RAW Bump and Normal Mapping
* Uncheck Lock Fresnel IOR to Refraction IOR
* Set the BRDF Type to GGX in the Reflection parameters
It's important to make sure that textures are interpreted properly for a linear workflow. You can change the colorspace for textures on the Texture2D node. Be sure to set the Colorspace for each map as listed in the above table.
In the V-Ray render settings under Color mapping, use the options shown in the following image.