I don't know about iboga, but 5-MeO-DMT is generally considered to be much less visual (some people don't report any visuals at all, just emotional experience.
Also, way fewer people take these drugs, partly because of their rarity, and partly because of the 'low' recreational value. Go to any liberal arts college arts program, and there's probably at least one person dropping acid and painting 'visionary' art, it's almost a cliche at this point. Way fewer people are doing that with iboga and 5-MeO.
Blessings
~ND