This tutorial is available as a PDF. Click here to view or download it
Never thought I would be doing this, but here I go:
We will be making this:
Create a blank canvas 800x600
Run clouds with the Blend Mode set as Difference TWICE. Everything else can be default
Invert colors, and do levels with the right bar that is in the middle all the way down
Run Emboss with default settings
Add a layer :AddNewLayer: and run clouds twice with the Blend Mode set as Difference. Set the Layer Blend Mode to Overlay
Run curves :Curves: with the settings shown below
There you go! You have your moss texture!
There are a few other things to do to make it look more... um... mossy, but I don't have time to go over them right now. I have a date tonight at 6:00 and I have to get ready
Thanks for reading!
As an extra step, you could Gaussian Blur the lower layer at a radius of 2 for an extra mossy effect