This is sort of aimed at WakingNomad for hes the only one that i have read about that has a good experience of Shared Dreaming...

Ok so when you are in a dream with someone and say you make a... oh i don't know... a house with wings for example... If you woke out of that dream and the next night met up with the same person on another Shared dream, would the house you made the night before still be there? or is whatever you did/made any other time erased and you start a whole new dream?

Also i think i read in one of your posts that you and someone else woke someone up from in there room in your shared dream and they became Lucid...
How would your mind know what there room looked like if you had never been in it?

Sorry if these are stupid questions but im just trying to have a better understanding

Thanks