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Wetness/specularity to sandy shoreline?

Anyone know any way of making the sand of my landscape layer be affected by touching a water surface material? So I can add a wet look to the shoreline.

You can make a separate “wet sand” layer for your landscape, and paint that all around your shorelines. Or if you know that the water is going to be at the same Z value everywhere on the map, you can use the world position blue channel to lerp between dry sand and wet sand inside your landscape material’s sand layer.

Thanks @Nathaniel3W Trouble is i have several ponds at different Z positions. Painting I guess would work, but may look odd if it doesn’t perfectly align with the water plane.