I suddenly have depth perception. I never have before.
The world looks like a crappy Xbox game. Or like this

That's what stuff looks like in the real world. I thought only 3D modeling programs produced so much fake, plastic-looking overdramatic 3D effects. I'm staring at a tea cup like I smoked something I shouldn't have.
It just happened.
My hearing also suddenly became very fixed and precise and sharp, among other odd perceptual shifts. I had a serious mental breakdown when I realized the synesthesia was gone; but I think that's a matter of an overloaded neural link, and it's slowly coming back. Might need a few days to recover. I don't think I can actually survive without that; the world is in 3D but everything I hear is very flat and lifeless, that's not right. Where's the shapes and colors in the music? Where's the impossible textures and hues that can't physically exist?