These are thoughts I have pondered upon for at least 30 years now, and my conclusion is that we can create our own reality, on occasions at least.
I have no idea whether your overlay is real or not. Yet if I went to all the key points made up by your Great Pyramid profile, could I find support for the reality of the overlay? I am certain enough would occur to convince us all that here was something real.
The same can be said for the Glastonbury zodiac, conceived of by artist Katherine Maltwood in the 1920s. Her intuition brought it to life, and if we go into the 12 figures she hand drew on a map of the Somerset landscape we can catch glimpses of the astrological or mythical reality of this terrestrial zodiac.
Yet what is the chicken and what is the egg? Which comes first? Our creation, or the retro existence of what we create? Or is all simply an eternal loop of activity?
There are no hard and fast answers. Just possibilities.
Good luck with your research.