Effects

             Effects needed in our film opening are muzzle flashes both from a horizontal and front on view, and particle effects (bursts of dirt etc where bullets hit surroundings). I found a website with royalty free pre-keyed muzzle flashes and ditr particle effects, and downloaded a collection of these to choose suitable ones for the clip. The other option was to buy a collection of hundreds of pre-keyed effects that would have more variety, for example Action Essentials 2 package by Videocopilot: https://www.youtube.com/watch?v=N-9MOOTAc0E
              I have done a lot of editing on other movie softwares with pre-keyed green screened effects, so adding these effects into our movie through iMovie was not much a problem, and they are all in the movie, and play smoothly, and suit our film opening perfectly.