Aye, I think one thing that is key to the Bryce Purist philosophy is, "Can you animate it?", and the sad truth is that for some silly reason, you can't animate the Trees! (i.e., no wind or physics or gravity) So does that make the Treelab truly native Bryce? Fuzzy logic, but it's something I think Corel should have thought of when making the Tree Lab. But there's a million things one can pull into Bryce and still keep it a Bryce render, like lens flares and lightning effects! Would those effects count as postwork or prework? I'll do it all, it's not like I have a monogamous relationship with a silly (but totally awesome) program!