It is possible to add more than one effect layer, the only limitation is 24 different textures in Eevee for each single material.
The other 3 dynamic mask options are: Noise, Worn edges and Z-Mix.
8.2 Fx Layer – Mask Types
It is possible to add more than one effect layer, the only limitation is 24 different textures in Eevee for each single material.
The other 3 dynamic mask options are: Noise, Worn edges and Z-Mix.