I think I see what you are talking about. This 'void dream' I had seems to be the closest to induced lucidity yet for me which is exciting. I did get sensations of 'sliding' and vibrations in the first part with the HIs, the other three however there weren't even HIs to work with. I know for next time something like this happens though I will manage to form something from it, I guess it's as simple as thinking "since this is a dream, I should be in a forest." from there I could take it to one of the fantasies in medieval history that I want to live out in my LDs.

other reality checks I guess I could use would be "dream or not, I should have a body", obviously the mind would HAVE to oblige and I would become instantly aware that I am dreaming and could work from there? haha speculation.