An Aura Shift (A) occurs when a Therian changes the shape of their auric field or energy field to that of their theriotype. See also: Therianthropic Shifts It is important to note that there is no proof of auras, astral travel, or out of body experiences. We do need to be aware that there are alternative explanations to astral, aura, spiritual, and bilocation shifting. They may not necessarily be spiritual in nature, but could be explained by ordinary events. Astral shifts could be the result of our brains trying to process the surroundings and the effects of sensory fatigue, a well documented effect which is at work in those able to perceive common optical illusions. Seeing auras or outlines around people and objects can simply be due to eye fatigue and other perceptual processes.