How to Use color passes and add masks using Premiere Pro
Sin City used some of the coolest visual effects of any recent film. This two-part video uses a clip from the iconic film as an canvas to which we can apply some other editing effects using Adobe Premiere Pro. Specifically, the first part covers using color passes to absorb colors and adding a mask to focus the color spot. The second covers animating a garbage matte with keyframes and other topics. Unfortunately there is no link for downloading the Sin City clip from the video, so you are going to have to extrapolate these techniques to your own work instead of just using their example.