Done with Blender 2.78-rc1. No modeling, just procedural textures, noise over voroni with hdr environment. Found two tutorials, one by Midge Sinnaeve and the other by Blender Guru, both on youtube. Midge’s was easier to understand but Andrew pointed out some drawbacks. Have to render it in Experimental to get the new settings in both materials and modifiers.
Nice Zenitor-looks almost cactus like.