A ribbon brush for easy drawing of realistic-looking lightning.

Useful for natural scenery, backgrounds or magical effects.
You can switch off the automatic glow by ticking off 'Dual brush' in Tool property window.
Tilting the pen will affect the tightness of coils. Vertical pen will draw tighter, more jagged line, tilted pen will elongate it.

Recommended way to draw the lightning branches - start from the tip and draw towards the base while gradually applying pressure.

The brush can also be used to draw twisted twigs and branches, rocky terrain, cracks, chipped concrete or anything that could use a jagged line :)
edit: fixed the glow^^;
Old version