I have a model I would like to print, specifically it is a free-for-personal-use model of a car, complete with interior.
I would like to print it, but it is unprintable. I have tried to fix it in netfabb, which works OK. But now I realised I have another problem - the inside of the car is hollow, and has a full interior. I just want the shell of the car and a solid block (complete with opaque 'windows').
How would I take a detailed model and somehow extract a solid 3D printable model from it?