As for Bryce 4, as far as I know, they have only given away the demo not a full version. If they have, I doubly bummed (first for not being able to upgrade from 3D to 5 and then missing out on 4).< Uh, I really thought you could upgrade to B5 from B3D...? It was my understanding that once you bought it, you'd have to call Corel and they would authorize the previous serial number and provide you with a good B5 upgrade serial.