Petrus,
Quite a while back someone over at the Astral Pulse Forums (
http://www.astralpulse.com/forums/) reported an experience along the lines you suggest. I looked over there to find in but it's a very big site and so I gave up without success.
As I recall a skilled OBE guy went looking for the fictional Sci-Fi World an author was in the process of creating for a book, or maybe it was for a video game purpose. My memory is good, but it's short. The OBE guy reportedly not only found the place and accurately described it, but also described things about the fantasy world the author had only thought about, but not yet written about.
Surprise! Surprise! Thoughts are things.
A very similar situation occurs in the Partnered Exploring workshop every time it is given. A Meeting Place was originally created by my friend Rosalie and I. We did this basically by fantasizing the place into being in great detail. Participants in the workshop explore this place in some of the exercises. Some number of participants always report detailed features of the Meeting Place exactly as Rosalie and I created them.
One of the more interesting aspects of what some participants find it that during its original creation sometimes one of us would change our mind about some feature we had created and decide to "tear it out" and redo it. Participants often are confused about these features because at first they appear to be as originally created and then change into what they were "remodeled" to. Fascinating verifications come for participants from these remodeled features.
Bruce