Once you are satisfied with your animation setup in the MotionData editor, it is time to pre-process (bake) your data so that it is ready for runtime use. If the motion data is not pre-processed, the motion matching node
How to Pre-Process
To pre-process your motion data simply click the ‘Pre-Process’ button on the editor toolbar.
A loading / processing bar will appear during pre-processing. Do not close the UE4 editor while this is underway. When pre-processing is complete, the processing bar will disappear and the editor will be responsive again.
Note: Don’t forget to save your Motion Data asset after you have pre-processed
When to Pre-Process
Every time any setting is changed, animation added or removed or even a tag changed, pre-processing is required to re-bake the data otherwise you may be working on old data.
In some cases you will be prompted to automatically pre-process the data. However, this automatically turns of ‘optimization’ so that the pre-process time is short.