I find that the only features they have eliminated are those very useful ones in the vertex modeler. Such as being able to draw rectangles, ovals, and whatnot directly into the modeler, and not having to muck about with all those settings that you can do better by eye, with snap-to on. Another in the same modeler, is the eliminating of the ability to move and resize meshes with the same flexibility as the "Assembly" room (via the actual coordinace, and size). I used RDS 5.5 for several years, and Ray dream 3d before that, and not having the vertex modeler in Raydream, then having it, then having some nice features added, and some nice features taken away. Well, it is a little frustrating.