Focusing on the Color. a curve show

Focusing on the Color. a curve shows that the addition of a second key changes the default curve to a Smooth curve; the keys’ tangents are interpolated smoothly from one to the next. However, the material needs to retain the value 1 until it reaches frame 60. In Unity, you don’t have to set a key at frame 0. Each clip will start at 0 and end at the last key of the longest track