As i am new to blender i decided to learn by recreating some animations which have some interesting problems, and gain more knowledge about how tv intros are being done, collecting some parody intros to videos. I came across a simple yet troublesome effect , found no answer by googling or getting through tutorials and testing methods on this case led me to nowhere.
I attempted to recreate the animation above, especially the extending/appearing/drawn white strip with "randomly" placed gaps , strip which travels just above surface , casting shadow.
Tried dynamic paint,( with alpha channel) image sequence texture but although effect was very similar, whole invisible strip was casting shadow being Z transparent, in places where white color haven't reached yet.
I tried bezier curves as well(vector mode) but it appears that taper cant profile part in squary way, or maybe i am missing something here.
Shape keys seem to hard way to go , while keeping whole animation of stripe "unrolling" at constant speed.
I tried as well putting an array of planes on the path but it is completely not what i attempt to achieved.
I will edit post and add some pictures tomorrow.