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beginner- Material Graph setup for Megascans

Creating my materials from downloaded Megascan textures.
2 questions
1- For a rocky type terrain is there a reference material somewhere in the UE Marketplace or Library I could reference?
2- Is it necessary to feed Texture Coordinates to ALL of your Texture Sampler nodes?

Thanks in advance!

Take a read over my Pine Flatwoods writeup, @eco_bach2. I included my Landscape material along with ideas on how to use it. Adding TCs to all sampler nodes isn’t necessary, but can be useful if you plan to instance materials and need to adjust UVs procedurally.

Watch this tutorial for an interesting and simple technique with UVs:

Thanks guys. I also grabbed a couple Megascan assets from the UE Marketplace and studied the Master Materials.