Buckled Growth Sphere

Originally inspired by Nervous's Seed Lamp
http://n-e-r-v-o-u-s.com/shop/product.php?code=97&search=lighting

The inside is actually a totally separate bit of design to the outer skin. As the offset of the mesh was self-intersecting everywhere. So instead I used Millipede (isosurface) to get the same undulations, but ignore the complex 'folds', you can see the difference in cross section thickness. I then tessellated it with the inverse pattern of the outer surface.

To make it a single 3d printable mesh, i just deleted a single face on inner and outer skin, then lofted the naked edges. (creating a tiny hole through the model). Therefore creating a single mesh that folds in on itself, not sure if there is a better way of defining the space between two meshes as the solid area...

Full GH (Kangaroo - Meshmachine - Weaverbird - Millipede)

Special thanks to Laurent Delrieu for his interesting offset mesh method that i based my approach on.
http://www.grasshopper3d.com/forum/topics/offset-mesh-problems-with-3d-mesh-with-weaverbird