A mathematical correct tetrahedron Zelda Triforce made with OpenSCAD for 3D-printing.
See my GitHub page for the OpenSCAD source code and further Details: https://github.com/nhjschulz/3d-Triforce
Print with supports enabled. My recommended Cura slicer settings are
Support Placement: Everywhere
Support Overhang Angle: 50
Support Pattern: Concentric
Setting the "Outer Wall Line Count" to 5 creates more sturdiness and prevents the infill from shining through.