Triplanar Mapping and Height Lerp

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Working directly in the UE4 material editor is a great experience. When creating landscape materials that would normally be stretched or warped with some unusual geometry, a triplanar map is used.

 Create a material function and set the defuse material as a texture object, creat three texture samples and plug this in. The world position mask will require three-component masks. (RGB)

Create a material as normal, but use the TriplanarMapping material function call you previously created, with a MakeMaterialAttributes node.

Repeat these steps with a second material.

Then copy the nodes and create two material functions 


A new material is then created which can call both materials and uses a HeightLerp to create the effects of snow on top of mountain rocks.

Create a material instance from this and you're done!

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