Hollow out model for 3d printing

Question

The latest version of Meshlab claims it has the functionality to hollow out models for 3d printing. I've looked through all the menus trying to find this feature without any luck. Anyone have any idea where this functionality is?

Answer 1

To hollow out a closed model using meshlab you have to:

1. use the "Uniform mesh resampling" filter to build a second offset mesh; use a negative offset distance in world unit to build a second, internal, surface,
2. invert the offset mesh orientation using the "invert face orientation" filter
3. merge the two mesh together using the "flatten visible layer" filter

Answer 2

Have you considered just slicing it with little/no infill?

Answer 3

If you are using a Slicer with Vase mode settings that should do the trick. Alternatively if you want to change the model itself Meshmixer can do it and save the stl.