Partially UVW Animated alpha mask for circuit board shader It want a good old fashioned texture animation, not fade alpha, transparency etc.
I need to animate a circuit board growing effect.
I would take a circuit material, mask it with an alpha map and mask the alpha map with a faded texture that is animated to change UVW position from left to right (so that the animation is from right to left).
I spend a day to figure out why I can not move i.e. a wave texture or a just black image texture with faded border over the alpha mask.
How would you animate a reveal effect like that?
I found a solution. I wanted to have a mask that I can animate to determine the alpha channels overall opacity, overriding the alpha mask information. (can be used in literally any game vfx...) I have to figure out though how to add this as decal to other materials but that is another one.
Here is the solution: 
And here is the solution I used to blend it onto another material. If you can tell me how to make a more clean, proper version of this i would be very grateful. This feels a little bit wacky.