They went free a while back. They give you a registration number to use, but it's never worked for me. I e-mailed them and they sent me a reply re: what to do, which I followed to the letter, but it's still acting like a demo. I can make a couple of plants, and it'll give me a message that I've used up my allowed times per session. But it is a great little program. I've made some excellent looking plants, which I've taken into Bryce and retextured. I haven't tried using UV Mapper. Lyrra, when you say you run Plant Studio through UV Mapper, how do you do that? I didn't know you could run other programs through UV Mapper. Interesting. Melanie