.STEL File Extension

Stella Polyhedron

Developer Robert Webb
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What is an STEL file?

A STEL file is a 3D polyhedron created by one of Robert Webb's Stella programs. Stella users can open a STEL file to view and edit the polyhedron it contains. They can also use the STEL file to print a corresponding polyhedron net (foldable paper model).

More Information

Screenshot of a .stel file in Robert Webb Great Stella
STEL file open in Robert Webb Great Stella

The Stella suite, which consists of Small Stella, Great Stella, and Stella4D, allows you to view and create 3D polyhedra. Stella users can save a polyhedron as a STEL file by selecting File → Save as....

Each STEL file contains all the data Stella needs to show the polyhedron it describes to a user. This includes a record of the model, the model's current stellation, the model's facets, whether the model is spinning, morphing, or folding, and the user's current screen layout and views.

How to open an STEL file

You can open a STEL file in Small Stella, Great Stella, or Stella4D (Windows). To do so, select File → Open. Then, navigate to and open your STEL file.

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Programs that open STEL files

Verified by FileInfo.com

The FileInfo.com team has independently researched the Stella Polyhedron file format and Windows apps listed on this page. Our goal is 100% accuracy and we only publish information about file types that we have verified.

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