Modify a premade Landscape Material.

Hi,

I recently added some free content from UE MarketPlace - The Spring Landscape.

It came with a nice Landscape Material which I am struggling to modify to where I sculpt, the material changes accordingly.

I’ve made basic Auto Materials in the past but I can’t seem to add that feature to this with my current knowledge.

Could anyone please explain where I should be starting?

I have attached the material as a text document which can be pasted into UE4.

Many thanks.