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Yes true, but that energy field/aura is there in the first place since consciously or unconsciously he created an "attraction servitor" with the use of his patterns of thinking and beliefs. I have not been able to achieve that - not currently.
It's not even a servitor - it's much more simple.
A principle I've always used is just to pick a concept that you want to attach to their perceptions ("I'm alpha", "Don't see me", whatever) and repeat it in your head a few times. Once you've got yourself focused on it, expand it out into the physical space around you (that's really the best way I can describe it).
Really simple trick. I call them glamours, since they specifically target people's perceptions, but I'm not sure if there's an "official" name for it.