How to model a Coral or Sponge Structure? Can you please give me advise how to make this model?
1) My target goal image is this (perfect copy of the real object)



2) Now I have a model of a knife, but I don't know how to apply a bump mapping to the handle so it looks similar to the target image. You can see that it has a deep relief structure and also a rough surface.



3) I tried use this cloth bump texture, without success. It should be more organic.
I'm not sure you can get anything good with a bump map or procedurally, especially if you're supposed to make a "perfect copy", so I guess you'll have to make the mesh manually: create a cylinder, mirror it, use your picture as background to follow the shape, cut the holes profiles with the knife, extrude, add some edges with the knife to make a nice topology with quads, etc.