How to get the rocky texture all throughout the mesh, I obtained this obj from an external source and want to get the get the rocky texture all throughout the mesh
Try something like this. All I did was use a Noise Texture to slightly warp the vectors of a Voronai Texture to make the "cells" and to give them slightly uneven edges (less straight). Then I just filled in the surface detail by multiplying it again with another Noise Texture. I ran the result through the Height input of a Bump node, and gave it a bit of a gray color and a slight metallic value (to match your image).