This tutorial was written by the then owner of legittutorials.com . I bought the site and tutorials from him and have moved it to designertuts.com
Hey everybody, in this tutorial I will teach you how to make a grunge background, featuring grungy lines. Lets begin.
Step 1: The Background
Open up a new document whatever size you want. I'll be using 600x300 so the images fit on this page fine.
Grab the paint bucket tool and fill the background with a nice light yellow (#e3dfcb).
Create a new layer (ctrl+shift+n), set your foreground color to #524238, and your background color to #cab6a9. Render clouds on the new layer (filter>render>clouds).
Apply splatter to the clouds (filter>brush strokes>splatter). Use the settings shown in the picture.
Lower the opacity of this layer to 30 percent. Bam, we now have a simple grungy background to work over. Don't worry it'll get better.
Step 2: Lines
Create a new layer, and set your foreground color to black. Grab the line tool and make a bunch of 1 pixel black lines.
Create a new layer. On this layer, make a few 2pixel black lines. Just a few though.
Create another new layer. On this one make one, or two, 3 pixel black lines.
Lower the opacity of the 1 pixel lines to 70%, the 2 pixel to 85%, and leave the 3 pixel at 100%. Merge all our layers together (ctrl+shift+e).
Step 3: Filters
Make a duplicate of the layer (ctrl+j), and apply crosshatch (filter>brush strokes>cross hatch) with the following settings shown below. Lower the opacity to 35%.
Create another duplicate of the original (ctrl+j). apply splatter (remember where its at?) to this one. Use the following settings. Lower the opacity of this one to 65%.
Create another duplicate of the original, move this one on top of all the other layers. Pixelate this layer (filter>pixelate>mosaic) with a cell size of 12. Set the layer mode to soft light and the opacity to 50%. Here's how it should look so far.
Merge all the layers together (ctrl+shift+e), and create a duplicate (ctrl+j). Apply graphic pen (filter>sketch>graphic pen). Set the layer mode to overlay, and the opacity to 25%.
Step 4: Extra Grunge
If your happy with the results so far ignore this step. If not, lets add some more grunge. Download some grunge brushes from deviant art. Create a new layer, and brush over our lines in black and white.
Lower the opacity to 80% and were done! Here's how mine turned out.