Notes:
- The Brush editor does not support it, but you can use a text editor edit the VBR and set an aspect ratio >20. Interesting effects.
- If you want to be accurate, these sparkles are caused by the diaphragm in the camera (you don't see them in the physical world, only on photos). A diaphragm with an even number of blades produces as many spikes, those with an odd number twice as many so given that diaphragms have between 5 to 11 blades, you can have 6, 8, 10, 14, 18 or 22 spikes.