blender-core-runtime

To prevent Blender add-on crashes during undo operations, you must correctly manage bpy references and understand undo/redo invalidation. This ensures your script handles data restoration properly, avoiding state corruption and unexpected crashes when users reverse actions.

Executing bpy calls from background threads in Blender requires strict thread safety protocols to avoid UI freezes. You must properly schedule tasks using bpy.app.timers to ensure background rendering or processing scripts do not block the main event loop.

The best way to handle event scripting in Blender is by mastering bpy.app.timers and message bus subscriptions. This approach guarantees responsive and efficient script execution by properly managing event handling without polling overhead or blocking the application.

Using KDTree and BVHTree for spatial queries in Blender Python allows you to efficiently perform point and ray intersection tests. This ensures your scripts handle complex spatial data structures accurately without causing performance bottlenecks or crashes.

Running Python scripts in Blender's background mode has specific limitations regarding UI access and event handling. You must understand these background mode limitations to ensure your script executes reliably without graphical interface dependencies or unexpected termination.

Mathutils module changes cause script instability due to version-specific API changes in Blender. Addressing these critical issues related to spatial query structures and math operations prevents crashes and ensures your script maintains stability across different runtime environments.