Not voovoo. Tested, works. Used by Lynch and Dali to inspire dreamlike works. Used by Edison to aid solving complex problems https://www.scientificamerican.com/article/thomas-edisons-na...

Studies showed better math solving after hypnogagia state: https://pmc.ncbi.nlm.nih.gov/articles/PMC8654287/ https://www.science.org/doi/10.1126/sciadv.abj5866

Liminal Dreaming feels a lot more evocative of the state even if the psychologists want to call it hypnagogia.