This is a triangle shelf holder decorated with celtic knots as part of an assignment in MY4777 Class at Michigan Tech
I designed this object using Op...enSCAD with Celtic Knot Library from https://github.com/beanz/celtic-knot-scad.
I used Cura as the slicer as the slicer with 180 C and 30 printing speed because i want to avoid bridging problem. I used 20 % infill and it turns out to be strong enough.