Dzogchen is a Tibetan Buddhist yogic practice that is known to produce rainbow body. Sometimes called the Great Perfection, Tibetans consider it the fastest path to enlightenment. Dzogchen creates a state of mind from which the physical body transforms from a formed to a formless condition, becoming invisible to the common eye (i.e. rainbow body). This mental state is known as the true nature of mind.
Two phases are involved. In the first, called trekchö, the practitioner trains to accept that all physical phenomena are emanated aspects of a universal mind. In other words, if the universal mind is a cow’s udder, the teats on the udder would be emanates (not creation) of it. To the naked eye, each teat appears physically different. But, in essence, all teats are the same; an emanate of the mother udder, an aspect thereof. Thus, the trekchö practitioner learns to look through the physical differences found in mother nature and find sameness (universality) in everything that comes before the senses. When this happens in the day-to-day with effortless spontaneity the person will have achieved true state of mind. The once embodied aspect of the universal returns to the universal from which it emanated (i.e., rainbow body). The teats merges with the mother udder…they become what they once were.
Dzogchen’s second phase is called thögal. While trekchö and thögal practices usually proceed in parallel, the former must be completed before the latter can find realization. Thögal centers around the notion of a subtle body which supports the physical body. The subtle body is a system of energy channels which feed five chakras. The channels/chakras distribute animating energy and functional know-how throughout the body using disciplined breathing techniques. When trekchö is complete the practitioner curtails the animating/cognitive energy distribution in support of the dissolution that is primed to take place.
Ascetic, meditative lifestyles are prevalent traits of Dzogchen practitioners. The practitioners engage in deep, prolonged, meditation practices in order to absorb teachings. The meditation typically takes place in caves and hermitages, far removed from society. Practitioners, ever aware of the pitfalls of karma, live under a high moral imperative to avoid otherwise being blown off course by karmic influence. The practice is conducted under the watchful and demanding guidance of an accomplished Master who guides his students through the learning process.
There is at least one school in Tibet which teaches Dzogchen. As of 2018 it has thirteen rainbow body deaths to its credit since resuming operation in the late 1950’s.