Hi there, I’m currently doing a portrait of another celebrity as well. I was always told - a lot of reference before even starting, and now I know what it means, that is to say I’ve redescovered the meaning of it cause I had nude and portrait drawing and sculpting training for 8 years, but just as of recently started doing it in cg. So, the way I see it is as follows: firstly, a lot of reference doesn’t mean that it has to pass a lot of time before I’m prepared and ready to sculpt, it just means that I capture the essence (the way in which he or she hits me in a certain way, and only me) of the character, like for example drawing a quick caricature in my mind., and then I’m ready. Now I get a lot of references, like movies and photos from all the different angles so I can get the better feel of the proportions, but use them only very remotely, and never model over them, but rather observe them from time to time wile modeling. Use your pen or thumb for proportions. This screengrab of Clint doesn’t look like him, but if you know what you’re going for, it can help making the contour on that angle. I’m writing this down, cause nobody got a celebrity down yet, and when I say nobody I don’t count Brad Pitt in Benjamin Button small_orange_diamond
Cheers, and good luck