The add-on I used ("blender-bullet-export") worked enough to export rigid bodies from the scene into a .bullet file, but it relies on BGE.

Now that BGE is gone (for good) in Blender 2.80, what can we do to export physics data or .bullet files, and why there is no UI option or builtin available format after all those years.

  • $\begingroup$ I poked around to try and find information on the serialization format, but it looks like the wiki page even this pdf links to is gone. I'm curious, what are you using bullet serialization for? $\endgroup$
    – gandalf3
    Jul 30, 2019 at 7:36
  • $\begingroup$ I use the same Bullet Physics library API, so it is easy to import the rigid bodies in bullet with the .bullet file. $\endgroup$
    – Mark235
    Jul 30, 2019 at 7:55

1 Answer 1


Looks like I can answer my own question.

After some digging I found another simple add-on compatible with Blender 2.8 (this time called "bullet-blender-exporter", LOL) that exports a .json instead of a serialized .bullet file. A nice work-around for anyone that needs to export quickly the rigid bodies and constraints from Blender.

For anyone interested the add-on is this: https://github.com/xu-xionglong/bullet-blender-exporter


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