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PTMD RBXM
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Convert PTMD to RBXM

Can you convert PTMD to RBXM?
Verified by Adam B.· reviewed by FE Editorial ·updated Aug 28, 2026
QUICK ANSWER
Is it possible to convert PTMD to RBXM?
No - not a direct conversion.

There is no tool that turns a Polytoria .ptmd into a Roblox .rbxm, because each format stores engine-specific instances (parts, scripts, properties) that only its own creator app understands. The realistic path is to export or rebuild the underlying geometry as a neutral 3D format like .obj or .fbx, then import that into Roblox Studio and save it as .rbxm.

No direct path
Also to RBXM: LUAU

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Tested on macOS, Windows & Linux
Last verified Oct 2026

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Why convert PTMD to RBXM?

A .ptmd is built for Polytoria's Creator and describes objects the way the Polytoria engine reconstructs them, while an .rbxm is Roblox's serialized DOM of Instances. The two platforms are competitors with no shared schema, so the model has to be re-created rather than converted. People usually just want the same 3D shape usable inside Roblox Studio.

How to convert PTMD to RBXM

Export mesh, then rebuild in Roblox Studio FREE

If you can get the geometry out of Polytoria as .obj or .fbx, import it in Roblox Studio via the 3D Importer, then right-click the object and choose Save to File to write an .rbxm.

Roblox Studio (Insert / Save to File) FREE

Rebuild the model from scratch in Roblox Studio, then select it in the Explorer and use Save to File to produce the .rbxm. This is the only way to get true Roblox instances and scripts.

Blender (format bridge) OPEN-SOURCE

Use Blender to clean up any exported mesh and re-export it as .fbx or .obj, which Roblox Studio's importer accepts before you save it as .rbxm.

About these formats

.PTMD Polytoria Model

A PTMD file is a Polytoria Model, a single reusable 3D model saved from Polytoria Creator, the editor for the block-based game platform Polytoria. It stores an object hierarchy along with…

Open .PTMD details →
.RBXM Roblox Model File (Binary)

An RBXM file is a Roblox model saved in binary format by Roblox Studio. It can hold 3D parts, scripts, GUI elements, or any combination of Roblox objects. The only program that opens it is…

Open .RBXM details →

Quality & what to watch

  • No converter reads .ptmd outside Polytoria, so at best you transfer the raw shape, not the model logic.
  • Scripts, physics, joints and Polytoria-specific properties do not carry over and must be recreated in Studio.
  • Textures and materials usually need to be re-applied by hand after import.

Frequently asked questions

Is there a direct .ptmd to .rbxm converter?
No. The two formats belong to different game engines (Polytoria and Roblox) and share no common structure, so no direct converter exists.
Can I open a .ptmd file in Roblox Studio?
No. Roblox Studio only imports its own .rbxm/.rbxmx files plus standard meshes like .obj and .fbx, not Polytoria models.
What is the closest I can get?
Export or rebuild the geometry as .obj or .fbx, import it into Roblox Studio, then use Save to File to create an .rbxm.
Will scripts transfer?
No. Any behavior has to be rewritten in Luau inside Roblox Studio.