make noise on a sphere


I was used to make irregular sphere (like a cell with a lot of pseudopodes) in POV-RAY with isosurfaces+noise generator. I have tried to do the same in Blender with the noise tool of mesh panel, but the displacement of vertices is limited to the z-axis. How could I do to have a radial displacement? I have also tried with the displacement option of material but the result doesn’t fit with what I’m looking forward. Thanks for your help.

Apply subsurf on the sphere a couple of times and then you launch the script B-brush from Mesh->Scripts->;B-brush script. And start to paint.