Camoflage
Ok, so something i learned while working on a project for a military style website is how to make camoflage. I'll just teach you the basics, i'm sure you'll understand how easy it is quite soon.
Lets start out with a 1000x1000 picture and fill it with the cloud filter (Make sure you have black&white and colors). Use the filter a few times until you get a result you like. I guess you can already see where this is going, but not so fast ! Now go to Selct/Color Range. From the dropdown selct shadows first. Press ok and go to the channels tab (Look at your layer window). Click on Save selection as Channel (
) Then select the new channel. The magic of PS has now created a black and white image of your selected. CNTR-D the selction and use the gaussian blur at maybe 4,1. Then go to image/adjust/levels.
Move the sliders like i did on the right and press ok. Now look what happened: PS made it all smooth for us ! How nice of PS, seriously. CNTR-Select the channel to load the slection and go back to you layers, make a new layer and fill it with a color of you choice. Obviously you can do this trick with any color from the color range and thats the whole magic folks ! Honestly ... just make sure to use very lowly saturated colors, greens, browns, greys for your camo and you'll do fine.