With the patch, B5 is superior than B4, but not necessarily advanced. Render engine is better. Can get the same speed as B4 with lower settings and better quality with higher settings. Love the tree lab. light lab is nothing new, just organizes the lighting in B4 in a better way. Terrain and lattice labs are easier to work with but still the same old stuff...brush choices are round, round and round. You can pick any as long as its round. Consider the improvement of P5 over P4, of C2 over C1 and you'll see how far behind the times Corel is. I got my CG start in Bryce and will always appreciate it, but I'm moving on to Terragen and Universe and other packages.