This is my first attempt at making a custom brush. It's meant to simulate the bokeh effect that happens when light sources are out of focus. I've also included and example .PSD file just so you can see what I've done. Some may find it useful.
**Tips and Usage**
-I STRONGLY urge you to play with the brush settings, especially the scattering and color dynamics sections. This version of the brush was customized to my preferences, so you may wish to play around.
-Use this brush on an empty layer and set that layer to "Screen."
-I prefer to blur the layer a little bit, just because the edges are kinda of hard, but again, that's just me.
-Mess around with layer masks. I like to render a "Difference Cloud" a few times in the mask and blur it a bit just to break up the uniformity.
-EXPERIMENT. If you're getting brush off of the internet and not playing around with them, then you're just wasting photoshop awesomeness.
You don't have to credit me for using this, but it's be cool if you let me know what you think. It may inspire me to make more brush.