What if the idea of consciousness is a trick of the ego, and rather than something seeing the sight (for example), the sight is self-illuminating.

What if you aren't the thing seeing the world but you are the world that is "seen"? Or more like there is no such thing as a you at all, just a self-luminous mirage. Which is sort of a total medium ground between Idealism and Physicalism where there is only appearance, but that's full stop. Appearance/mirage without a substance that it appears to.