It sounds like you want to introduce the concept of dimension to dreaming and attach it consciousness. It does not have to be a spatial dimension, but a measurable extent of some kind. Like a scale.

If so, then this is a very popular view of consciousness. It's mostly adopted by occultists and spiritualists, and their stance is dubious because this dimension, for the moment, is only subjectively defined. I have read quite a bit of neurological literature on consciousness and no where have I seen a neuroscientist suggest that consciousness is measurable or scalable. Perhaps with new discoveries we'll know more someday.