How many of you have been successful in creating a persistent world in your lucid dreams? E.g. if you leave an object in one place it remains there when you return in the next dream.

I've often heard that this is not possible, but some of the stuff I've read on these forums suggests that in fact many people have been able to do exactly this.

So, have you? And if so, is there any technique you use to make your dreams link together and work in series or does it just happen?