In Ancient Egypt, religious ceremonies took the form of Dramatic Performances similar to Greek Theater. A Kheri-Heb Priest was their form of Film Director. Other Priests were essentially Actors, performing a role while wearing a Mask or Costume, and reading lines from a text. The ceremony was performed in the Temples to an audience of "worshipers." Idols are a form of Award (i.e. Academy Awards) given to the Priest for his work. Some statues were given offerings by the people, as offerings were both a form of Tax and revenue for the play. Funerary plays included the Lamentation of Isis & Nephthys, the Death and Resurrection of Osiris, the Battles of Horus and Seth, etc. Other plays served other reasons.
My ceremonies I conducted in the 1990s were similar. I have no other priests so I did everything myself; in place of costumes or masks I used Letterhead and Identities; along with my Magical FX using Chronokinesis. I am a KheriHeb Master. This serves as an area of study in my profession as Archaeologist & Egyptologist.