When I do pics from the fashion show, then I print big and use a magnifying glass, since I can't really see the outfits in person,.....yet
My autograph was very HQ and I looked at bunch of other HQ pics, but some of the detail was still a little iffy (since those pics were with different bras) so, what I actually had to do was see the actual modeled bra itself and them go from there. If you're referring to the eyes, I kinda just went from memory of when I met her. Those kind of things stick with you. The pic was a starting point, but I would say to myself "there was more sparkle", or "they were bigger" , etc. Pretty much I just guestimate. And it comes out pretty good IMO. When I do something, I want it to be 125%. When I do real people, I know my pic could never be exactly like them, but I want to at least do them justice.
Thanks TR