Clearly my eyes aren’t* open and I cannot take in external visual stimuli in my dreams, however I experience them similar to the visual experience in my minds eye or imagination or whathaveyou. Similarly I feel like I experience something akin to touch or feel (like the occasional flying or falling dream, or the feel of grass or something).
I don’t recall having anything similar to smell or sound in a dream though (except occasionally hearing a real sound while waking up that wasn’t actually part of the dream) What’s your experience?
I don’t actively recall smell or taste being a feature so I guess probably not. Every other sense I definitely have, though.
On the general subject of things people say can’t happen in dreams beyond senses, I can also read, feel pain, see color, urinate without doing so in real life, and die.