Impossible tribar

Impossible tribar 3d printed Art Sculptures
This model is also called the 'Penrose Triangle'. The configuration is impossible to create in 3D, using full cubes (with all 6 sides intact for each cube). What you are looking at is an optical illusion, where only 3 adjacent-to-each-other walls from each cube are included, and the inside concave corners masquerade as external convex ones :)

Also, I used this model for the cover image of my 2004 book, 'Rendering for Beginners':

The book cover is mentioned in this article, which also has more info+links regarding the tribar model:

And, here are my alternate versions of the tribar: and

cm: 6.36 w x 5.514 d x 1.58 h
in: 2.504 w x 2.171 d x 0.622 h


  • White Strong & Flexible

    White nylon plastic with a matte finish and slight grainy feel.