In the attached image the left copy of the mesh is at suD level 4, on the screen shot to the right its at subD level 5 with smoothing on. You will notice on this organic shape there are hard edge creases. Continuing to add subD levels continues to make these edge creases harder. Obviously you do not want hard edge creases such as this when dealing with organics. Please see attached screenshot.
I started with a standard cube imported from 3DS max and subdivided it 1 time and shaped it. And then continued to add more subdivisions as I needed to describe form. However these hard edges keep appearing.
Attachments

