Awesome post and thought provoking topic. I really like that wood photograph you used to illustrate color constancy.

I've read that our brains can essentially hallucinate certain details of images or environments given the correct set of variables changing or taking place in a moment faster than our brains can process. I think there's some "stare at the black dot" experiments in existence that show how it works.

I find that intriguing, it makes sense when our reality is a construct of imagery that our brains must keep composed to a certain degree for reality to remain real...

Maybe that is why colors, sounds, and emotions tend to blend together during tripping. It's a strange feeling seeing the entire room take on either a darker or brighter hue suddenly that the mind somehow picks up on during the altered state, but otherwise would never really cognitively notice the change in hues.