What if my eyes did not respond to photons but instead registered any one of the assortment of other particles penetrating the bedroom wall in front of me? I would not “see” what appears to be a solid object shaped by the photons bouncing off it. I would recognize the wall as the illusion it is, formed by the photons reaching my eyes.
Instead, what would I see? Would it be a shape defined by some particle or wave or field of energy? Would I “see” a shadow of a wall and a shadow of the tree beyond? What if I could see both, and also infra-red? What would that vision be like? Just as I can hear thru and beyond a wall, could I see thru and beyond it as well?
Solids are not solids at all. They are an illusion of impenetrable matter, “seen” because they can bounce photons. They appear as solid as a hologram sending photons to my eyes . Given a choice, I think I would like gama-ray vision.