I almost always render when I switch lights-- unless the lightset is manifestly awful. I never render in draft though-- could that be a factor? When I started using P5 there was no reasonable difference between Draft and Production speed-- in fact some draft was slower and I could never tell anything from the results that I really wanted to know. I love Firefly too, I just wish it was consistent. I did everything to push it two days ago, even stored some new textures out of any Poser folder-- it found them immediately whereas I don't think I've ever been able to get it to find and render Yann hair. I might be able to test it tonight if I don't crumble under the heat, I'll let you know what happens. Emily