Can one format be converted into another after delivery?

To some extent, yes, though converting from STL back to an editable format like 3DM loses the original construction history and isn't a clean reversal.

Do I need to request all three formats, or just one?

Requesting all three at project completion is common practice and ensures coverage for manufacturing, future edits, and marketing use.

Is there an extra cost for receiving multiple file formats?

This varies by studio — many include multiple format exports as standard, so it's worth confirming this at the start of a project.

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STL vs 3DM vs OBJ: Jewelry File Formats Explained

by Arvion Designs

on October 9, 2026

STL vs 3DM vs OBJ comes down to purpose — STL is the manufacturing standard, 3DM is the editable native CAD format, and OBJ is commonly used for rendering and visualization pipelines. Knowing which to request avoids compatibility issues down the line.

STL — The Manufacturing Standard

STL (Stereolithography) files describe a model’s surface geometry as a mesh of triangles, widely supported by casting houses and 3D printers. This is the format you need if your end goal is physical production.

3DM — The Editable Native Format

3DM is Rhino’s native file format, retaining full editability of the original design (curves, surfaces, construction history). Request this format if you anticipate needing future modifications or want to retain full design control.

OBJ — Common for Rendering and Visualization

OBJ files are widely compatible with rendering software and 3D visualization tools (including some AR/try-on applications), making this the right choice if your primary need is marketing visuals rather than manufacturing.

Which Format Should You Request?

STL: For sending files to a manufacturer for casting or 3D printing.
3DM: For retaining the ability to make future edits to the 3D model.
OBJ: For use in rendering software or augmented reality (AR) apps.
All Three Formats (STL, 3DM, OBJ): For comprehensive coverage across most projects.

Frequently Asked Questions

Can one format be converted into another after delivery?
To some extent, yes, though converting from STL (mesh-based) back to an editable format like 3DM loses the original construction history and isn’t a clean reversal.
Do I need to request all three formats, or just one?
Requesting all three at project completion is common practice and ensures you’re covered for manufacturing, future edits, and marketing use without needing to go back to the designer later.
Is there an extra cost for receiving multiple file formats?
This varies by studio — many include multiple format exports as standard, so it’s worth confirming this at the start of a project.

Confirm your file format needs before starting — contact us →