material id shader

#1

hey

i got a multi sub material with ~ 10 id. over this multi sub material i want to compose via vray blend a dirt map. this dirtmap has it own mask but i want to compose the mask with some ids in order to blend differently between the materials.

example:

glas should be lower affected by mir dirt layer as my concrete.

any ideas ?

on max 2012 + vray 2

#2

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