Wet stains on clothes?

[joecoe]

What is the easiest way to create something that looks like wet stains on clothes?
I don't need a completely wet see through clothes.
I need something like a wet stain if you accidentally spill a drink on your clothes.

 

[Papa Ernie]

What is the easiest way to create something that looks like wet stains on clothes?
I don't need a completely wet see through clothes.
I need something like a wet stain if you accidentally spill a drink on your clothes.

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[BeardWonerArt]

But the stains/ splash itself should be see through ?
Easiest way to do that is a matching texture map (like a splash) in the opacity channel of your piece of clothing, the texture map has to be the same size as your base/ diffuse map.
White parts of the map stay non transparent, shades of gray will become see through (the darker the more transparent).

If you need help with this just ask, not at my PC atm. but I can show you an example later.