Optical Illusion Vase
by cmetzel, published
Twisting "gear" vase but the paths shift on the way up so the tooth on the bottom doesn't become the tooth on the top, creates a pretty cool effect.
Generate your gcode with 0 infill, and modify the code to remove the top layers. Item is drawn solid so you can specify perimeters instead of trying to nail the wall thickness and infill settings in your slicer.