So this Sunday, for the first time I'm planning on doing a studio shoot where I intend to digitally add in a background in post production, via a monochrome background in the studio; a "green screen" so to speak. Pursuant to this, I have a few questions for you kind folks. First and foremost, is there a particular color of background that it would be best to use? I can't literally use a green screen because the outfit is green. The "opposite" of green is red, but the model's hair will be red (it's a Poison Ivy concept). I'm guessing that blue would be either best, or as good as any other strong color that's not green or red; but does the shade matter much? Back in ye olden days before "green screen" became the common term, I remember seeing this kind of technology often use a light blue or sky blue background; does it matter if I use light blue, royal blue, or some other shade? Or should I be using a color other than blue? Second, can you suggest a good software to do this with? The most advanced editing software I've been using thus far is Paint Shop Pro 5; which although over a decade old has been serving me pretty well thus far, but I suspect it would be insufficient for this task (or else there are features in it that would help that I'm as yet unaware of). In particular, when trying to select only part of an image, I often have trouble selecting around the model's hair; is there a software or tool that allows one to edit "only the background" when parts of the foreground are semi-transparent, such as hair? Finally, are there any issues relating to lighting that I should watch out for when attempting to do this? Or generally any other issues I ought to be aware of that I haven't thought of? Thanks a lot.