I am currently editing a 35mm film in Final Cut Pro 6, which will be matched back to a print when complete. I am experimenting with using superimpositions in a few of the scenes, and I am wondering what composite mode would best approximate the look of an A and B roll superimposition in the final print. The last time that I did this, I was editing on a Steenbeck (and simply ran both layers of the workprint sandwiched together through the play head - which showed exactly what the final product would look like). My best guess, based upon my current understanding, is that "darken" would be the best choice. But I am worried, working with a video edit, that I might get it wrong (too much black would be the obvious problem). Thanks in advance for your help.