Actually I misread your original post. I thought you were referring to a legal drug with the thought-process benefits (but lacking the psychedelic effects) rather than the psychedelic aspects alone.

I am familiar with a few legal psychedelics, but it's not something I'm interested in :(

Yeah... the thought process alteration is really the same as the psychedelic effects. More so than visuals or anything, what the psychedelics do is temporarily change the way you think and perceive reality.