Those are the DAZ "Ghosts of Christmas Past" that show up in nearly every cyclorama, right now, in DS. My own theory is that DS has a different "World Space" than Poser and lights are not loading completely IN FRONT of the cyclorama, but are reflecting off the panels where you would normally have foreground transparencies of trees, rocks, etc. Since the cyclorama was one of my very first models I loaded on December 24, 2003 "DS-DAY", I puzzled over this and after rotating the Cyc around a bit, discovered the problem and then just used the X or Y Trans controls to slide them "off stage". (Z-Trans doesn't help much). They also appear in DS scenes as Grey Ghosts- but same thing and same fix. One other fix would be going into the Surfaces menu and making them invisible, but I personally find that just sliding them out of the scene is the quickest fix if you don't fully GET the Surfaces controls. Zoom away from the Cyclorama a little bit and you will clearly see them and can slide them off as far as needed for your scene. It's something that I'm sure DAZ will fix in a later update, probably in the early Beta release.