Very cool tutorial, Fashmir.
Another use for the glitter tool is to lay down a texture for painting over.
Choose a very small particle size, with a big brush, and lay down a lot of glitter in an area. You can shape the area, cut into it, smooth it a bit with light pressure from the eraser tool.
Now you can either airbrush over that, use 'instadry' oils over it, cut into it with pencil or other tools, or you can add a layer and use any of the tools overtop the textured surface.
AndyRage's mantra for graphics engine code:
"Sure - how hard can it be?"