I thought this was well done...something about it is really reminiscent of iboga for me, both in terms of the aesthetic of the visuals, and the feel of it.

https://www.nfb.ca/film/afterlife/

Never tried iboga, but nice cartoon representation of the afterlife anyway. I lived in Canada as a kid for a few years and remdmber seeing a lot of these kinds of artistic animations made by the National Film Board.

Just saw the date, 1978, so I probably saw this one too! Thanks for posting.