Ajax, This is outstanding. I agree with Eternl Knight on the dirt effect preferences. I have a couple of questions:- a) Would this work for bump and displacement mapped detail? b) Although not strictly 'dirt', but coming under the heading of 'weathering' would it be possible to use the settings on the ball at top left with a rusty colour, and the settings on the ball at top right as is, at the same time, to create a rusting dirty ball? Cheers Ian