You didn't put any answers, but I do know it is polite to greet the persons as they come on stage, and clap or cheer when they finish a song. It is also a good idea to put any electronic devices in sleep mode or simply turn them off.
I would say color or texture
Hello!
Put simply, photorealism is a type of painting that using very intricate details to mirror a specific photo or scene as best as it can. Attached is an example from Ralph Goings.<span />