The biggest secret (almost approaching outright fraud) in tessellation folding is that the very repetitive nature of the pattern tends to smooth out the errors that usually accumulate when making a super-complex model. And, even though individual cells of a finished tessellation can have gross errors in them, the eye kind of smooths those out, too.
You all know of what I speak ... points that are not sharp, precreased folds creaping away from their landmarks... What I do is seek for robust, and error-tolerant methods. Folding thirds by successive pinches is a great example ... no matter how bad your first guess, eventually you converge on those thirds. My experience is that a global fold should have about 5 landmarks that I try to eyeball a "least-squares" fit to. And if the first few are wrong ... eventually things straighten out by the averaging process. I really admire designers who recognize that errors are an integral part of this art, and accommodate this as a feature, rather than as a flaw. With best wishes, Galen T. Pickett https://www.etsy.com/shop/GeometricOrigami
