this is my first tut... made it a while ago, just thought i would post it...
plz dont submit anywhere... lol

1.) first use something like google to find an image thats pretty dirty/messy

2.) then select a small portion of the picture that you think will be a cool grunge brush
i will use this one:



3.) copy that and make it a new thing in photoshop

4.) click luminosity on the layer properties: (after that it should be grey/whiteish)



5.) go to layer > new adjustment layer > brightness/contrast and put the setting like this:



NOTE: you can always change these settings, but for this tutorial, this is what im using

6.) do the same thing but this time with these settings:



7.) delete any parts that u dont want, almost always delete the sides so that it isnt very sharp

8.) go to edit > define brush preset

9.) name your brush and click save, now you can use your brush

10.) have some kick ass fun

here is what i got:



tell me what you guys think, my first tutorial