Ambient Occlusion (2)

Hey this might be a silly question to Mental Ray veterans, but I have been reading about the ambient occlusion in mental ray and looking up tutorials etc. One thing I can't seem to figure out is....The dirt shader reference? I see a lot about using the dirt shader to get ambient occlusion. Did the name change in version 7 to mib_amb_occlusion and was just called dirt shader in the past or is this slang? What's the deal? Any takers?

QUOTE(jtate @ 06/03/06, 04:24 AM) [snapback]238916[/snapback]
Did the name change in version 7 to mib_amb_occlusion and was just called dirt shader in the past or is this slang?

THey er 2 different shaders that d the sqame thinga bit differently. THe dirt shader is not realy needed anymore.