Here is a render of just the wall. Occasionally the mats don't wrap well on stones, but I left it and touched it up in post. It is possible to exchange a rounded terrain for the rocks.

I originally had a cube as the back center piece, but the texture appeared to lay flat.

When using the textures from those sites, you may want to create a duplicate of each, make a grayscale copy, sharpen and or adjust the levels to create a bump map.

Enjoy

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Ockham's razor- It's that simple