I understand your point, and your reaction is a fair one, but not the other guy's. Aside from already noted differences in the different styles of clothing, there were plenty of indicators that this is not some "really old time". The man in the first illusion mission is wearing a buttoned shirt. Stephanie is wearing a black leather suit, which I'm pretty sure wasn't a thing until around the 1900's. Modern clothing was actually already shown when you went to the black market with Venus. Everyone's actually wearing modern underwear. Candy was wearing Coverall's. The succubus is wearing pantyhose. Tamara's outfit is also modern. Karolina is wearing a suit and a top hat. For someone to perceive the change to be "sudden", it just means that they have been selectively ignoring everything and being lost in their made up medieval fantasy.