One fast way make an image of a large group is by simply rendering the characters one at a time and and pasting each to the background as you go. 1. Create your background scene without characters. 2. Open and pose a character, then render it. 3. From the top menu of Poser, select "Display... Paste Onto Background." 4. Move your camera back a little bit, repose and render your character (or load a new character)first, and repeat the process.