The latest Substance plug-in (18.104.22.168) is debuted in Maya 2019 and it works really well.
(Soon this will be released for the older Maya versions as well.)
I put together a simple example to see how can you use it.
(Mixing two Substance material based on their height map differences):
- The two main aiStandardSurface shader are mixed via a aiMixShader.
- For the mask I used a floatLogic node combined with a floatCondition node.
The base was the two height map – generated in exr format :).
- For the dispalcement I used the bult-in aiLayerFloat node to get correct results.
- The whole shader tree:
Best place to get Substance materials/files is the Substance Source site of course.
If you’re never used the pug-in before I recommend you to go to the official Substance channel (Substance in Maya playlist).