From Fractracer Wiki
Open animation panel from main menu: "View"->"Animation" and set "Enable" checkbox:
Yo can see some parameters:
- Quality - greater is better, but slower
- Duration - in seconds
- Frame Rate - frames per second
Push "+" button to insert new key frame to current timeline position.
Push "-" button to remove current key frame.
Any changes in objects, will influence only on current keyframe.
To rendering animation press "Start" button. You will be prompted to select file name and codec.