missing square puzzle illusion —

Founded missing square puzzle illusion models & stl files for printing
Simple Lock Box Puzzle
MyNameIsntBob
Polypanels  Square
MakeAnything
4x4 Puzzle Cube
Dr.Havoc
Rhinoceros Puzzle
Renee_Taylor
Supportless Sphere Puzzle V2
Red Kraken Forge
Perfect Pocket Square
Daniel Sterner