Substance Painter - How to blend two substance materials with a heightmap - Ex: Grow moss in cracks

synergy11

I have two substances I made imported into Painter. A stone material and a moss material. I want to blend these two together using the heightmap of the stone material. So the moss starts revealing itself in the lower cracks of the stone heightmap. 

This is easy to do in Substance designer and UE4. In designer you just through down a blend node and pump the stone heighmap into the mask input with a levels or histogram scan node for more control and BOOM. 

There must be a way to do this in Painter?

Any help would be greatly appreciated. Thank you.

Jerc

If you are adding a fill layer with a substance material, create a mask for this layer, add a Fill effect in it and use the same material in the mask channel, make sure to select the height channel in the Output Selection dropdown and add a level effect on top to control the blending.
Make sure the Scale, Offset and all these options are the same between the layer and the mask too.