Mirrors had an impact like VR, but 200-300 years ago. They were a clear reflection of reality. Previously the best you could get was a calm pool of water. You

Mirrors had an impact like VR, but 200-300 years ago. They were a clear reflection of reality. Previously the best you could get was a calm pool of water. You can probably understand how mirror makers would accept being poisoned by mercury to create that experience.