Vertex Height-lerp Material

Preview of the final product

A vertex-paintable ground material covered by sand and mossy gravel

Create a clear height difference between layers

Use HeightLerp and Displacement based on Nanite

Adding these commands in DefaultEngine.ini under the Config folder after [/Script/Engine.RendererSettings]

Turn Tessellation on in the material setting

And don't forget to enable Nanite Support for the mesh!

Plug in textures for one layer with material attributes

...and duplicate 2 times

Blend them with the HeightLerp node, with Vertex Color plugged in Transition Phase.

Named Reroutes make sorting easy!

And that's pretty much it! We have everything to customize a surface with 3 different layers blended!

(Nanite displacement doesn't appear while vertex painting)

Shadow stays on the mesh when adjusting height multipliers, and looks bad when used in real-time...

Toggle the Shadow Cache Invalidation Behavior under mesh details and the problem is gone!

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