Didn't they? I wouldn't mind the second version as wallpaper in a real room. Such a nice blue and not too much background to be obnixous.

That looks fantastic! Yeah...I almost forgot to say anything about changing some of the parameters of the brushes themselves. You can vary the size, color, scattering, opacity, etc. This will make a BIG difference in how everything looks. And wouldn't you know, it's pouring rain today....sigh

Sometimes the most interesting effect is the simplest. Having a black or white background and then using white over that or another favorite color can produce very interesting results. Also, one might put green or blue on top of red a little off register to give what looks like the old 3d type of thing you view with those special glasses. I usually do this sort of thing in separate layers so I can adjust or delete the effect. When I make a brush, I usually try for a middle of the ground size so I can increase or decrease the size a little when I actually use the brush. Also, most of the time, I don't use 100% opacity for a new brush. A little at a time or use the airbrush to experiment with a new brush. I like the ones that look like old paper or are so big that they take up the whole page. Sometimes anyway. They are fun to get "paper" that looks like a real page or a piece of fabric. Dull, antique yellor or old gold color is nice on black to start with. When I do stuff like this, there really is little need for other special effects using filters and such. Just a few thoughts here before I head off to work. Have a nice day, all.

ahh...I get it. I think :D Let me think about this. Perhaps if you could be just a little more specific or send some URLs of examples that you have seen, I might be able to help a little more.

Your best bet is to just do it. Basically, create a grayscale image of the graphic you want as a brush with a transparent background and trimmed as much as you can get. Then...edit...define as brush. A very simple thing to do. Other than that, you can experiment a little bit and learn a LOT by doing just that.