I guess I should have clarified: when you talk about reality being a simulation, do you mean that we collectively live in a simulated universe, or that you personally are playing a very realistic vr game?

Agree with ivape.

To add: our reality does not have to be rendered in it's entirety, we'll just have very convincing and unscripted first-person view simulations. Only what you look at is getting rendered (e.g. tiny structures only get rendered when you use microscope).