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Hello,

I am working on big project with a lot of windows:

[ATTACH]44899[/ATTACH]

I have a lot of textures sticking on the buildings that look something like this: (this is a simplified example)

[ATTACH]44900[/ATTACH]

Now I would like to "randomly" select  a part of those windows so I can make theme darker or lighter to create a bit of variation. (Like you can see in the upper left corner in this example)

My question is the following:

It's pretty time-consuming to do this manualy. Does anyone of you know how to do this in a more automated way? A script maybe?

Thanks!

Jonas