3D Printing a body scan

Hi all,

I am 3D scanning myself and friends and then 3D printing them. Using the scanning app I send it via email and then begin to clean the mesh, making sure that I can get it watertight and ready for 3D printing.

My question is how do you make your mesh watertight? eg. the bottom of the scan of someones upper body, what software do you use?

Thanks

I think meshmixer is used by many folks:

http://www.meshmixer.com/