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?