how do they make random and semi random patterns on textiles (like camouflage)?
In: Technology
They are not random they are repeating pattern that is printed on fabric. The process is not that different from how you printed books or new paper, So the pattern will repeat in one direction after the circumference of the rollers you use but can be unique for the width of the pattern.
The simple way to understand is to see it so just look at how [Multicam is produced](https://youtu.be/frwFKf037Qs?t=93) in a video from the manufacturers themself. You can see current military users of that pattern [on this page](https://en.wikipedia.org/wiki/MultiCam)
The repeat of Multicam is after 26 inches (66cm) according to [this page](https://soldiersystems.net/2014/08/22/operational-camouflage-pattern-scorpion-w2-variant/)
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