Lightning Infill

This is an example of Cura's "lightning" infill. Less material, faster printing. Pretty cool! Can save a lot of print time.

Lightning infill is not an evolution of previous infill techniques but instead a completely new approach to creating internal support structures. Lightning infill works by identifying and supporting the internal areas of a model that need assistance to print successfully.

The resulting infill ends up having a branching tree-like structure that resembles a lightning bolt. That and the fact that they can help you get lightning-fast prints is the reason it’s called lighting infill.