I recently found a website called Texture Haven, which has a bunch of free, high res textures. I downloaded the cobblestone no.7, I added it into blender using the node wranglers auto fill tool for the principled shader. I set blender to use the true displacement method and added an adaptive subsurf. The render had strange stepping on the displacement:
I noticed that the displacement texture was an 8-bit image and had colour banding. I tried removing this in photoshop using noise+blur, but this created strange artifacts when rendered in blender. How can I remove this stepping in the displacement texture?
EDIT: The image I originally uploaded was created using the 8bit image downloaded from texture haven: https://texturehaven.com/tex/?c=floor&t=cobblestone_floor_07. I would like to know if there is any way to smooth out the texture.