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Revision as of 17:17, 28 October 2019 by Ubit (Talk | contribs)

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Welcome to OpenSimulator, an open-source multi-user 3D virtual environment and metaverse server platform.

OpenSimulator is a highly complex system. Various usage scenarios (standalone, grid, hypergrid, etc.) in combination with different dependencies (e.g. different versions of mono on Linux/Mac) can sometimes produce unexpected or unstable behaviour.

If you are upgrading from a previous version of OpenSimulator, then we strongly recommend that you start off with the default configuration files and port over any changes you made to your older version of OpenSimulator.

It corresponds to the Dev (git master) as of October 28, 2019. This version includes several corrections and improvements to the previous release

You can download this release of OpenSimulator from Download.

Known issues

  • Users may need to reduce the viewer bandwidth, if they notice invisible prims or parts of terrain.


OpenSimulator requires:

  • At least .NET Framework 4.6 when running under Windows.
  • At least Mono 5.x when running under Mono (Linux or Mac).

Due to database migration renumbering which occurred at release, if you are upgrading from a version of OpenSimulator prior to, then you MUST first upgrade to ** and then proceed to upgrade to See for more advice.

Changes and Fixes

  • New script engine: Yengine (XEngine is still the default).
  • New OSSL functions, see OSSL Functions with examples.
  • Support for viewer side objects cache.
  • Support mesh objects animations.
  • Early Bakes on Mesh (BoM) support. Viewer developments are required.
  • MRM module was removed.


Many, many thanks to all the developers, testers and community members who contributed to this release and who help out with OpenSimulator generally. Your hard work makes this all possible.

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