Just an illusion? Between simulation, emulation, and hyper-realism

Simulated virtual environments can elicit in the users a strong feeling of “being there” (place illusion), making them feel as if they control a body different from their own (body-ownership illusion) and react to virtuality analogously to physicality (plausibility illusion). Accordingly, a debate is gaining traction in different scientific fields about how the notion itself of illusion is to be interpreted within the contemporary mediascape. Does it imply an unconscious deception accomplished through a false perception, or is it rather a lusory attitude adopted in a peculiar kind of make-believe relation? What is the difference between illusion, deception, and hallucination? How does illusion turn into deception? How does deception become illusion?