Thought I would share this. I could not have done this without Roll20, and the outcome was pretty cool. Briefly: Roll20 allows the Keeper to move players to Pages, but a player has no way of knowing if they are going to the same Page as all the other players . Delusion ensues! My players finished the last session inside a cottage in the woods, and one of them was suffering from delusions, but hadn't had one for a while. I took this opportunity to make a new Page, with a duplicate of the cottage map. However, I connected the front door of the cottage with a mirror image of the same cottage - walk from one right into the other. I then added corpses, bloody footprints, an arcane sign my players have been investigating and a horror room with a skinless corpse and something being summoned - all in the mirror cottage only. Since we use Dynamic Lighting, this would all be exposed room by room, and by torchlight alone. At the start of the next session I put all my players into the regular cottage and the other player (call him Ben) into the fake cottage Page. I had put Tokens for all the other players into the fake cottage Page, and what Ben thought was the other players moving them around was actually me. I had closed the front door with a sight blocker, so Ben could move around the cottage, which looked normal, but could not see into the mirror cottage. Then something happened outside and all the players moved out to take a look. Ben tried, and then I removed the sight blocker at the front door, and he saw a completely new cottage, covered in blood. What followed was exactly as I had hoped. Ben called out, "Guys, I think we missed something!" but the other players were exploring the thing outside. I could see Ben moving tentatively through the mirror cottage, and I took the opportunity to reduce the power of his torch, so it looked like it was failing. He went back into the 'real cottage' but I had removed all the player Tokens by now, so he was alone. He went back to exploring the mirror cottage. He started to describe what he was seeing, but none of the other players could see it. They could see his Token (on their map) standing outside the real cottage, and I told them he was walking around the drive looking pale and dazed so they came back to find out what was going on. Ben had reached the horror room, and I gave him a brief glimpse of it and put him back in the real cottage map. What came after was even better. Ben had no idea it was just a delusion. It could have been a vital part of the scenario. He took the players back into the real cottage and walked them through it all, telling them what he saw. They took him seriously and changed their plans because of his delusion, leading to them being convinced a waitress they had met earlier was part of an occult plot (she was not). A fantastic RPG moment, and something that would have been impossible in person.
