There's two main DAZ products and a couple of more specialised items. Cyclorama -- the simplest, basically a curved L-profile ground/backdrop item, with a couple of transmappable panels of similar shape, allowing something a little like a stage set. Good for basic DIY backgrounds Woodland Playsets (2) -- Sculpted ground, a curved backdrop, and fixed trees. The shape of the ground hides the background/foreground divide. Limited flexibility. Millenium Environment -- Sculpted and morphable ground, curved multi-layer background, many movable plant props, both 3D and 2D transmap panels. Well supported by add-on packages. Of the RDNA products, I haven't used the IC3. They have an earlier version as a freebie, which is similar to the Cyclorama. They also have a freebie Skydome. The Microcosm range can do a lot, but you need to build up the detail, it's not a drop-in-and-go system in the way the DAZ products can be. It's usable with P4, but P5/6 give more options. Yes, it's worth checking the add-ons available. RDNA have some freebies for the Microcosm range which are worth grabbing; tileable ground textures can be applied to the DAZ products. There's a fifth scenery package in the DAZ 3D Starter Bundle, which suffers from the background defaulting to be behind the camera, and PoserPros has a pack of extra props intended for the Woodland Playsets. I've probably missed stuff.