It's cool to see works done with my shaders, and this tutorial, by Gleb Alexandrov is a very nice one !!!
Gleb Alexandrov is a 3D artist doing impressive works using Blender, like this one.
He offers us a nice tutorial to show how to use AO for 'dirting' objects :
"Today we'll explore yet another way of making procedural dirt (ambient occlusion) in Blender, using OSL shader by Francois Gastaldo.
Note that I'm using modified version of this shader, posted by BAO2 on Blenderartists.
Original version: http://vadrouillegraphique.blogspot.n...
Rocket Artillery model by SONGKRO on Blendswap."
THANKS for this work Gleb !
ADDEDUM : GAO and GAO2 are updated ! Click here to see the new versions GAO1.1 and GAO2.1 !