Au contraire, morning glory seeds will do the trick. I don't necessarily recommend this, because some people complain of the vasoconstriction, and the alkaloid content in the seeds varies unpredictably due to natural circumstances, but I had success with dosages between 1000-1500 morning gory seeds. That's a lot of seed matter to consume, so it may be that HBWR is the more efficient way to go. But I can say that morning glory is effective at such dosages.
I don't really do it anymore because at those dosages I would trip for up to 24 hours and the come-up was almost unbearably slow (2-3 hours of nausea for me). I haven't had that kind of time on my hands in several years, though if I did again at some point I would be down to re-explore morning glory. I also once made the mistake of taking 1500 seeds on a Sunday and had to go into work the next morning still tripping.
The visuals were not exactly like acid in my experience, but very strong and euphoric. Once the nausea passes, the visuals explode into a kind of pulsing blue-purple flowery arabesque patterns flowing down overlaid on my field of vision like Matrix code. On one occasion my entire field of vision became enclosed in a rectangular frame and started pulsing to the music that was playing, and so on, and so on. As I come upon 5-8 hours of tripping, the visuals become more of a warping of surfaces, like Dali's clock in "the persistence of memory," walls dripping down like wet paint. Audio enhancement is quite spectacular; I have recorded in my notes the sensation that "I'm sitting inside the music, and I cannot even remember what artist it is, each song lasts an eternity, unless I focus on the mundane I cannot even remember that there is music playing, it just seems like part of the environment like the sound has replaced the walls around me" and so on and so forth. Apparently gives a good warping of time-consciousness as well!
Mixes well with cannabis for me, but I mix literally everything with cannabis so that's not such an informed opinion probably. Can't say about the nitrous. As always, plan your combos ahead of time and take low doses. One or two hits of cannabis is usually plenty to kick things up a notch, even for the seasoned smoker.
