You can abort a timewarp as it is being generated by clicking anywhere on the screen. The frames that were not generated are replaced by frames with the message “Unrendered Frame”.

For example, if you abort a 10-frame timewarp after the first 5 frames, the first 5 frames of the timewarp are followed by 5 black frames with the message “Unrendered Frame.”

Frames with the “Unrendered Frame” message also occur when you lack framestore space. For example, when reprocessing a soft edit containing a timewarp, rather than changing the timing of the entire soft edit, “Unrendered” frames are substituted for the timewarped frames.