This has been studied quite extensively and at least semi-scientifically for Ayahuasca specifically and also "clinical" DMT experiences (DMT is the main psychoa

This has been studied quite extensively and at least semi-scientifically for Ayahuasca specifically and also "clinical" DMT experiences (DMT is the main psychoactive ingredient in Ayahuasca) and the upshot is that yes, the imagery is surprisingly consistent even when removed from the typical ayahuasca-ceremony context and cultural factors. For some references see "The Antipodes of the Mind", a book by an Israeli cognitive psychologist who spent years doing phenomenological study of ayahuasca experiences, and "DMT: The spirit molecule", a book about studies using DMT done in the 90s.