What's New in the MotionBuilder 2025 SDK

• Software Dependencies
  • Linux:
  • Windows:
  • Common:
  • Common (optional):
• Changes to the API
  • New classes
  • New methods
  • New properties and enums
  • New macros
  • Changes specific to the Python API

Software Dependencies

The following operating systems, compilers, and languages are required:

Linux:

• RHEL 8.6 WS or higher, or Rocky Linux 8.6 or higher
• gcc-toolset-11 or higher

Windows:

• Windows 10 or higher
• Microsoft Visual Studio 2022 or higher, with the "Desktop development with C++" and "C++ CMake tools for Windows" Visual Studio components installed

Common:

• CMake 3.19 or higher
• Ninja build
• Python 3.11.4
• FBX SDK 2020.3.5

Common (optional):

• QT 6.5.3
• PySide2 6.5.3
• Boost 1.82.0
• USD 0.23.11

MotionBuilder now requires CMake and Ninja to compile samples and new plugins. See Using C++ with MotionBuilder for details.

Changes to the API

New classes

• ORUsdStageProxy: C++ only, lets you create a Usd Stage Proxy node.

New methods

• GetTimeMarkLock(), SetTimeMarkLock() and SetAllTimeMarkLock() added to FBTake: GetTimeMarkLock returns the locks status of a time mark, SetTimeMarkLock lets you set the lock status of a time mark, and SetAllTimeMarkLock lets you set the lock status of all the time marks.
• GetGlobalTimeMarkLock(), SetGlobalTimeMarkLock() and SetAllGlobalTimeMarkLock() added to FBPlayerControl: GetGlobalTimeMarkLock returns the locks status of a global time mark, SetGlobalTimeMarkLock lets you set the lock status of a global time mark, and SetAllGlobalTimeMarkLock lets you set the lock status of all the global time marks.
• IsExactlyOnFrame() added to FBTime: returns if a time is exactly on a frame.

New properties and enums

• OnDeleteNode added to FBTree: C++ only, new callback called upon node deletion.
• OnStartupCompleted added to FBApplication: new callback called when the startup of the application has been completed.

New macros

• FBRegisterWindowTool: C++ only, similar to the FBRegisterTool macro but adds the registered tool to the 'Window' menu instead of the 'Open Reality > Tools' menu.
• FBElementClassImplementationWithName: C++ only, similar to the FBElementClassImplementation macro allows specifying a unique name for the object available in the Asset Browser.

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Changes specific to the Python API

• pyfbstandalone: new python module that lets you initalize MotionBuilder with its initialize() method after launching the mobupy python interpreter.
• FBUsdStageProxy: new class lets you create a Usd Stage Proxy node and interacts with it.
• CreateUsdStageProxy: helper function that lets you create a Usd Stage Proxy node.
• Show() of the FBPopup: the Show method now returns a boolean indicating if the popup was shown or not.