I had my first invisible sim in Twinbrook the other day. I was going to play the Rackett household and when I went in the house, it showed that one of the sims was downtown, so I went to find her and all I saw was a plumbob hovering over a bench. Top left corner, showed she was reading, so I clicked on her to go home and the action kept going away and you could tell she was sitting there waving, like something was in her way, you know, we have all heard that cry before, lol. So I gave up and just left without saving. I have not tried again, but it will probably work, also funny seeing a guitar floating in air when an invisible sim is playing it. That is what I saw before I left this family, when I went back to the house, funny.