This is my old western townseries of tutorials. This tutorial will show you how to make the scrub brush (it's scattered around the town). If you would like to make the other items in this series, you will find them here.

My color chart. Right click on this and save it to your computer.

Step 1. Open a new image 150 x 150, white background. Copy your color chart and paste it as a new layer. Move to the top of your canvas out of your way. When you need a color, just click on it with your eye dropper tool.

Step 2. Add a new layer. Set your foreground to color #1 and your background to color #2. Choose your airbrush, and use the settings in the screenshot. Spray colors #1 and #2 until you have something similar to mine.

 

Step 3. Add a new layer. Use color #3 and draw some more lines, similar to mine.

Step 4. Add a new layer. Change your airbrush size down to 1 and spray somr more bits (use color #1 and 3).

Step 5. Add a new layer. Change your brush size up to about 4-5 and lower your density to about 20. Use color #3 amd spray a bit in the center.

Step 6. Now just tweak it as you wish - just add colors on separate layers. This isn't an exact science so just experiment until you have something you like. Your result will not look exactly like mine.

Step 7. When you're satisfied with your creation, delete the color chart and background. Merge visible layers and save as a psp file.

I hope you enjoyed the tut, and please let me know if you experience any problems.