Well, this is my first tutorial, so here it goes. The result will be a nice looking Camo Background, that is pretty easy to make.

I. First, make a new image of 250x250. Set your background color to black, the foreground doesn't matter. Press ctrl+backspace to fill the canvas with black.

II. Click the paintbrush tool and set it to 8 pixels. Set your foreground to any color you'd like, but make sure its a LIGHT color. I chose 00C6FF. I kept my cursor at the top right, so I could just move the bar up and down and have a close-match darker color **for later**.

III. Now, draw a bunch of random lines. Cover ABOUT 50% of the screen.

IV. Next, duplicate the layer (ctrl+j). Set your foreground to a MUCH darker version of your current color (I used 0024FF), and cover ABOUT another 50% of the screen. LEAVE BLACK SPOTS. Set the blend mode to overlay and merge layers (ctrl+e). Your image should look close to this:

V. Now to cover all those empty black spots. Duplicate the layer (ctrl+j), and press ctrl and click it to select it. Click Edit->transform->rotate 180º(degrees). Set the blend mode to lighten, and merge layers (ctrl+e). Press ctrl+d to deselect everything.

VI. We make the camo in this step. Press Filter->pixellate->crystallize. Set the cell size to 10 and press ok. Repeat step 5 (V), this time it will be with the camo instead of the lines, and set the blend mode to Darken instead of Lighten. Invert the colors (ctrl+I) on the new layer, then merge layers(ctrl+e). This left me with some nice green mix in the middle.

VII. Now repeat step 5, and use lighten again. THIS TIME DON'T MERGE LAYERS. Repeat step 5 AGAIN. This time, rotate it 90º(degrees) CW, instead of 180º(degrees). Merge all visible layers (ctrl+shift+e). Thats all, except for...

OPTIONAL STEP VIII. Filter->brush strokes->crosshatch. Use these settings: Stroke Length - 20, Sharpness - 10, Strength - 1.

Finished Product:



Finished Product WITH crosshatch:



Sorry I didn't have images. I had up till step 3 then kinda forgot to save my progress. It should be fairly obvious what it should look like nonetheless.

I suggest making it a lot bigger, which will require more lines and more repetition of step 5, but this should work well if your making a sig... Just cut off parts of it, and put some blended text into it.