Is this 3D model free to download?

Yes, three shadows object is free to download from Thingiverse. Open it in the free Thinger app, or use the "Download from Thingiverse" link to open the original listing by the creator.

Where do I download the STL file?

The download is hosted by Thingiverse. Use the "Download from Thingiverse" link on this page to open the original listing and grab the file, or save it to your print queue in the free Thinger app.

Designed by moebio, published on Thingiverse. Please credit the creator when sharing your print.

Can I print this at home?

Yes. This is a printable 3D model intended for home FDM and resin printers. Check the original listing for suggested print settings.

three shadows object 3D printable model by moebio

three shadows object

Source: Thingiverse by moebio

The three shadows object is a free printable 3D model from Thingiverse by moebio. This nice object casts 3 different shadows: a circle, a square and an equilateral triangle (the 3 Bauhaus essential shapes). You can download the STL file from the original listing below and print it at home.

Open in Thinger (free) Download from Thingiverse

159 saves Source: Thingiverse Updated 2026-10-15 License: CC-BY · commercial OK Category: Education & Science

Tags: circle, education, geometry, shadow, square, triangle

About this model

This nice object casts 3 different shadows: a circle, a square and an equilateral triangle (the 3 Bauhaus essential shapes). It's important to note that this is theoretically truth only when light rays arrive in parallel (which requires a punctual source of light infinitely distant). In practice Sun rays will do the job perfectly, whereas artificial lights won't. There are many more objects, often more complex than this one, that cast interesting shadows. Check, for instance, this one: Also very famous is the EGB objects, featured in the book cover Gödel, Escher Bach, and found among the examples in OpenSCAD. (I printed a version with some rice on it (I used a straw to slide the rice while printing) and made a nice maraca).

Frequently asked questions

Is this 3D model free to download?: Yes. three shadows object is free to download from Thingiverse. Open it in the free Thinger app, or use the "Download from Thingiverse" link above to open the original listing.
Where is the STL hosted?: The download is hosted by Thingiverse, not by Thinger. We link you directly to the original listing by moebio.
Who made this model?: Designed by moebio, published on Thingiverse. Please credit the creator when sharing your print online.
Can I print this at home?: Yes. This model is intended for home FDM and resin 3D printers. Check the original listing for suggested print settings like layer height and supports.