I think it would be way rad if you could take an object and mesh it with different fills. For instance, taking the typical [ solid rabbit object ] and changing it into a [ mesh ] that you would have the option to use just the hollow structures [ example of an awesome deer head ] . This function would potentially have triangle and/or some sort of polygon fills that would calculate the most efficient arrangement of whichever fill to create the structure.
This would be great because
1) You would save money on printing plastic because you only print with as much as you need to create the design. It would make prototyping cheaper. However, this might make print time last longer (since it would be a lot more intricate of a print than a solid object)
2) It would be an easy way to make a simple object interesting [ example ]
3) Honestly, it's a really cool thing that I would want for a bunch of projects.