I think something is wrong with my HitFilmPro. Like a bug or something. I am trying to appy light saber effect or electricity on a black plane and set it to ADD or SCREEN blend mode which I did million times and we all know what that does. But in my case even after I restared my computer and program it's still not removing black after I apply blending mode. It's literally 1920 by 1080 p composit with same size Black Plane and than I drag Light Sword effect on it I cliick Blending Modes-Add (or even Screen). And it doesn't do anything.
What should I do?