MotionBuilder 2026 Release Notes
Welcome to MotionBuilder 2026. These release notes describe known limitations, issues, and fixes included in this release. To learn about the new features and updated workflows, see What's New in MotionBuilder 2026 and What's New in MotionBuilder 2026 SDK.
For complete MotionBuilder configuration, licensing and deployment options, see MotionBuilder Installation.
What's Fixed
| General |
| Hang when inspecting an audio clip MOBU-12194 |
| Optical tool marker values listed vertically are not readable MOBU-12041 |
| Values cut off and difficult to edit in relation constraint boxes MOBU-11944 |
| Send to active connection UI element missing MOBU-12206 |
| MotionBuilder doesn't start maximized MOBU-12227 |
| Shortcut key and contextual menu not always working properly MOBU-12225 |
| USD |
| USD Stage not always rendered when loading an FBX file MOBU-12241 |
| File I/O |
| Certain scenes crashing on File > New MOBU-12233 |
| Crash with FBX scenes containing invalid data in some of its LayerElement parts MOBU-12218 |
| Crash when loading a scene with multiple Cycle Creator Time Marks MOBU-12219 |
| Crashes when loading scenes with deleted custom keying groups MOBU-12231 |
| Story |
| Crash when dragging & dropping clip in Story MOBU-12237 |
| Ripple manipulator could be stuck once used MOBU-12223 |
| Character glitch when writing to a Story clip MOBU-12236 |
| FCurves |
| Crash when calling FBFCurve.KeyDelete on an orphan FCurve MOBU-12226 |
| Crash when plotting with the plot period of 0 MOBU-12220 |
| Constraints |
| Texture translation/scaling properties have different behavior from previous versions MOBU-12221 |
| Devices |
| Crash when selecting an input device MOBU-12222 |
| SDK |
| runtime error when getting QStyle object from a QWidget MOBU-12211 |
| import PySide6.QtUiTools fails MOBU-11828 |
| QtUiTools.loadUiType returns None MOBU-12184 |
| Stack reserve size has decreased to 1 MB MOBU-12228 |
| Crash when calling FBDevice.RecordingStartTime MOBU-12232 |
