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Is there an efficient way to add a weathering effect to an object? By weathering, I am thinking of an overlaid thin layer of mottled grime on a sign or a car, maybe a little rust here or there.

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  • $\begingroup$ How much does the non-trial version cost? $\endgroup$ – vndep Jul 25 '19 at 20:18
  • $\begingroup$ @whatamesh Is there a way to do what I want without Substance Painter? I have nothing to do with that product... $\endgroup$ – vndep Jul 26 '19 at 18:10
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There are many video-tutorials for this topic on Youtube and (answered) questions here in BSE. To get you started I selected some of them for you:

How to Make Rust

Quickly Add Dirt to Crevices

Using Ambient Occlusion to add Grunge

Need to make (node setup) of realistic dirt/ grime/grunge on top of image texture of ceramic tiles

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The approach I settled on was relatively simple: because the underlying object was a rectangle, I created a plane of the same dimensions and superimposed it on top; loaded a black and white image for texture and then adjusted the transparency. It can be found here.

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