Good old Asurf with fancy effects like orbit trap lights, little fog, Dof and fractalized textures. Made years ago a tutorial, but with original Amazing Surf from Mandelbulber, which is slightly different than this used here (no Julia needed e.g.) but values can be extrapolated with almost all Surf variants within Mandelbulber. See it at You Tube: How to do organic shapes.
Mandelbulber 2.33. Amazing Surf M3D