1) You want to light the green screen with 2 identical units, set at 45ยบ to the screen. You could use Kno Flos, or any other unit set to flood, and back far enough to light the screen evenly. Your talent you want to light with a key, a bounce fill, and a small backlight. The screen and the talent need to be roughly at the same exposure.
2) I have not seen or used this solution. One thing is clear: it's designed to use with their ring light. Essentially, that light casts zero shadow of your talent onto the fabric. I suspect that for this to work, you must use such a ring light. Otherwise, the light kicking back from the fabric will be uneven. That means, you must light you talent in a full frontal manner. It may be that you can augment the flat front lighting with a side light to get some ratio. However, that will probably require you stop down for the talent, and as a result, your screen may be too dark. This looks to me to be a bad solution. However, I have not used it.
Rick Wise
director of photography
Oakland, CA
http://www.RickWiseDP.com
email: Rick@RickWiseDP.com
