The material node contains a time node, which will increase according to time, and the blueprint also has a function to obtain time. When you need to interpolate, set the game time obtained by the blueprint to the material, and the difference between the two times will start from 0. increase, from 0 to 1
alpha mainly controls flipping, if alpha=1, time interpolation is from 0 to 1, if alpha=0, time interpolation is from 1 to 0
I re-uploaded the screenshot:
