Probably many, but my understanding is that the prophets "visions" aren't really meant to be taken literally: god is supposed to be this thing outside of reason and perception (not a "thing" actually), the visions are what the prophet's human mind makes up: throne, gold, rainbows and stuff aren't what the divine _actually_ is, it's just how the prophet's human mind visualises it. Also sometimes descriptions of visions are symbolic, which means these descriptions are as far from the vision as the vision is far from "actual" god.

(History of God is an interesting book, even/especially for atheists)