Well, there are those of us who might fall into that category of shadowless "Super Sly," but not as a result of a tweezing regime ("Ouch, OUCH!"), just the effect of melanin shut-down in the remaining domical follicles. I take no credit; it's entirely the result of my genetics. Genetics thinned the hair, genetics turned the survivors white, so a shadowless appearance is the result. The genes giveth; the genes taketh away.