Many people mistakenly refer to vaporous shapes or trails of fog-like mist as ectoplasm.
Many vaporous shapes have been captured on video and in photos.
They are not exhalations like our daily colloquies and vaporous breath.
If we take it strictly to mean the belief in ghosts or spirits having the " vaporous materiality " proper to the objects of dream or hallucination, it is certain that the agency of such phantasms is not the sole cause to which all mystic happenings are referred (though ghosts and spirits are everywhere believed in, and appear to be endowed with greater predominance as religious synthesis advances amongst primitive peoples).
It " looks like a vaporous cloud " and is full of tricks and illusions of sense.