The ability lay let layers follow a curvature in z-axis.
Hackaday - non-planar-layer-fdm
Why is this useful?
This is a great way of actually creating prints with critical curvature in z - like a model of a wing fx.
- Do other slicers do this?:
No other slicers does this, a single post-processor might.
Slic3r has implemented a different solution to the problem by implementing variable layerheight.