I ate mushrooms once in a dream, and the trip was as real as a normal mushroom trip, down to every detail I've ever noticed about it. Same thing with acid. I once chewed a salvia leaf in a dream too but I didn't get any effects except for a mint taste (which is definately not what salvia tastes like). Smoking weed in dreams usually just puts me in a state of "having a good time" and isn't much like the real life effects at all.