.mdl File Extension

Learn what a .mdl file contains, how to open it, and how Poly supports this 3D format.

File extension details for .mdl

Partial Support
File typeGame model (ambiguous suffix)
MIME type
EncodingBinary model data; structure varies between games and tools
Operating systemsWindows, macOS, Linux
Opens withBlender, Noesis
Poly supportPartial. The suffix is ambiguous, so accurate format identification is required.
Indexed by PolyYes. Poly indexes the filename and extracted model metadata when the file is valid.
Preview in PolyPartial. A preview depends on identifying the particular MDL variant.
Poly agentYes. An optimized rendition of the 3D object or scene is provided to the agent, allowing compact yet information-rich multimodal interaction with 3D files.

What kind of file is a .mdl?

Game model (ambiguous suffix) files use binary model data; structure varies between games and tools. The suffix is shared by several unrelated game and modelling formats, so the name alone does not identify one specification.1

How do I open a .mdl?

Use Blender or Noesis with a matching importer. Keep skins and related assets alongside the model, then verify scale, axis orientation, materials, and animation timing after import.

Poly support for .mdl

Poly recognizes the model/x-mdl media type and indexes the filename plus supported model metadata. Because MDL is ambiguous, format-aware processing depends on identifying the actual variant. The Poly agent receives an optimized rendition for compact, information-rich multimodal interaction. The original remains available for download.

Working with .mdl files

Export a copy to glTF or GLB for modern scene exchange, or OBJ for a static mesh. Keep the original because game-specific animation, skin, and tag data may not survive conversion.1

Footnotes

  1. Game-engine format authors. Reference source. Documents the format's structures or its use in the relevant game toolchain. 2
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