Well, I can give you some details. Each light in Poser has an attached Shadow Camera (which is basically a camera in the same position as the light - for the most part) that is used to cast shadows from the light. In simplistic terms, the camera is used to get silhouettes of objects within its view and these are projected onto objects behind them as shadows. You'll find them in your Scene files (PZ3), Light files (LT2), and any other files that have lights (some Pose files give you different lighting schemes, for example) as SHADOW_CAM_???. I'm not certain, but I think there is a way to select them in Poser, but don't quote me on that. :0) BYS