There's no question on the macro scale that solids are solid to the viewer, and light bounces off solids and gets picked up by various waiting eyeballs, and so on, and waves of sound get sensed and smells get smelled.
The possibility exists however that this whole spectrum of apparent solidity is the way it is because of postulated conditions set up by and in consciousness. This perspective aligns more closely to the Hindu cosmology than it does to most Westerrn schools. The big knotty question it raises is whether any given individual viewpoint (such as thee or I) could be restored to the level of energy or causation (or whatever it should be called) from which it made/subscribed to those conditions, thus regaining an ability to shift them about.
Richard Bach plays with these ideas to great effect in The Bridge Across Forever.
If a spiritual being gets dragged down to hynotic agreement with spacetime as it is experienced by bodies ioperating on their limited bandwidths, what gets "him" stuck therein, and how does he get to undo the addiction?
And if this is the case, what happebns to his own perceptions when he does undo the habits of lifetimes being focused soelly on the forces and frequencies of the apparent material plane?
I think these are really interestin questions, even though they are based on a hypothesis.
If, converesely, our basic nature IS just complex networks of cells and nerves and all consciousness is a projection from these arrays, like a movie projector pointing back at itself with mirrors or some such, then the questions become very different indeed. SUch as, "where does virtue come from"? , etc.