I think the verdict might be that for anyone using ONLY Poser 4 for pictures, upgrading to Poser 5 is well worthwhile. For anyone using Poser to create figures for rendering in Vue, Bryce, Cinema 4D etc, the attractions of Poser 5 are relatively few. The money spent on upgarding to Poser 5 could equally well be spent on getting a PROPER render engine (like Vue, Bryce, etc).