I like everything you say, but by definition, an illusion cannot be real. In the English language, if you call something an illusion, you are *saying* it's not real, the same way if you call a man a bachelor, you're *saying* he's not married. There are different things you might mean (like "illusions can *feel* real") but if so, you need to explain yourself. So if you meant something different, I'd like to hear what you meant.