### Smooth Brush Tool

Drag with the Smooth Brush Tool to blur an image you have painted. This works on all image map types and is perticularly useful when making Lightmaps and Curvy Maps.
The strength of the effect is effected by the brush size and opacity. A large brush with a high opacity will blur your image very quickly. A small brush and low opacity will have a subtle effect.
You can access the smooth brush quickly while painting by holding down the Shift key.