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I have tried this before i wrote this post but it does not give the right result.
This is because that shader is either applied to the text object, which makes it non scrollable.
Or it is applied to a layer, but that way i cant put the text where i want to have it on screen.
The scrolling text needs to be placed in a river in my game, which is the botom half of the screen, so the effect needs to be in that position.