Ooh nice they've arrived!
What do you mean not 'defined' enough? As in, the ball is not completely round? Yes, some pictures will be much appreciated
You might be able to try sculpting or using epoxy clay...I'm not sure how it will react to the material. By the way, which material did you order?
Thanks Echo!
P.S. by the way if there really is a problem with the sculpt, like missing pieces, you can contact Shapeways directly through their customer service.