I have tried to make this kind of effect on hitfilm but I absolutely have no idea how to..,I have spent yesterday night and whole day today I am new on hitfilm.
@steffu did you manage to achieve the effect? It looks to me just like a feathered mask being moved.
No, I haven't achieved the effect. I want to select the horse area and put moving bright light from left to right and vanish at the end. In gimp, it's so easy because I can just delete the selected area and put a layer under the picture.Wow, I just found the way to do it.I just have to remove the horse area in gimp and add the removed version to hitfilm :OBasically, Layer - Removed versionLayer - EffectLayer - Main versionBig brain time.
Works! Here is the result