As I asked in a different post: Why doesn't Curious offer free upgrades to owners of the version of Poser released directly before version 6 was announced? The folks who make Rhino offer free versions if you are making a single step upgrade. That means that if you own version 3 and you want version 4, it's a free upgrade but if you own version 2 and want version 4, then you have to pay a small upgrade fee (not the full cost of the product). It would be a nice way to get more users to support the company when it releases a product. I'm glad to see Poser finally includes an HDRI render ability. I just hope the rig and animation features haven't been left behind just to advance the render engine.