I am needing advice on using gels to create different backgrounds. I understand that black or dark grey works the best. Is it best to use seamless paper? Would it work on the muslin backdrops? I envision that it might look cool with the crinkle looking muslin backdrop (I'm okay with that kind of wrinkle). Any opinions? Also, I am using strobe lights. I can find all kinds of info on using gels with flashes, but not much on strobes. Any advice there? I will be using this in my new studio. However, the first use will be at a preschool shooting "school" pics. Is there a way to set up the strobe so that I can change the gels quickly? PS. Anyone thinking of shooting preschool pics should think twice on how sane they are!