This is from another post on this forum
Step 1: Download my handy uniform templates HERE.
Step 2: Create your own camo.
Step 2.1: First create a new document 300 X 300.
Step 2.2: Fill the base layer with whatever base color you wish your camo to be.
Step 2.3: Create a new layer.
Step 2.4: On this new layer, go to Filters>Render>Difference Clouds (make shure your colors are set to black and white). Keep doing this untill you get a pattern that looks vaugely camo-ish.
Step 2.5: Go to Image>Adjustment>Brightnes/Contrast. Throw the contrast to full. You should see a patern of black and white splotches.
Step 2.6: Select which ever color makes the niftier pattern using the magic wand tool.
Step 2.7: Fill that selection withthe second color of your camo.
Step 2.8: Go to Select>Inverse. Hit delete.
Step 3: Repeat Step 2 untill allyour colors are in your camo. Don't worry if it doesn't look perfect. Optionaly, play around with the blending modes on your different layers to try new effects.
Step 4: Go to Layers>Flatten Image.
Step 5: Go to Filters>Pattern maker. Set Hight and Width to 300, Smoothness to 3, and Sample Detail to 10. Generate untill you see a patern you like. Hit OK.
Step 6: Go to Edit>Define Pattern and save your new camo.
Step 7: Load up the uniform templates and use the pattern stamp tool to paint you new camo onto the color layer.
Step 8: Paint in all the other details.
Step 9: Add in any patches above the wrinkles layer.
Step 10: Flatten your skin.
Step 11: Save as .DDS. Save with DX5, and use existing mipmaps.
Voila, you have a new skin.