dirt map not affecting it´s own object

would really love the dirt map to have the option to not affect it self, no self shadowing, more like a matte material. now when comping in on live foto I have to split the walls so that it dont shadowing it self.

/Daniel

theres an option in the dirtmap that does just that.

EDIT: oh wait im thinking the opposite.

yes. That´s what made me think of it. Or even better to be able to set up groups and how they affect the other etc.

/daniel