This is fascinating. I'm rather surprised that people seem to be able to actually see their tulpa after a while. I do worry about the ethical implications though -- with what we see with split brain patients, it seems plausible that a tulpa may actually be a separate person. Indeed, if this is true, and the tulpa's memories aren't being confabulated on the spot, it would suggest that the host would lose the use of the part of their brain that is running the tulpa, decreasing their intelligence. Which is a pity, because I really want to try this, but I don't want to risk permanently decreasing my intelligence.