Some tests I did in blender with the node editor and micro displacement. Could have put more detail but my pc was already blowing up...
Blend file: https://pasteall.org/blend/540c83e07e014af593a341a7d0d8f18e
Mixing flat color with micro displacement
Using textures nodes to make a Heightmap and displacement for a plane mesh
Then tried to make a sky material as well