More work on this. I tried to keep the dithering on the face to a minimum, and reduce the dithering on the clothes and cap some. I did keep some dither on the latter, though, since it help to describe texture. Also made an attempt to add the necklace she's wearing in the ref photo.
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Whoops, sorry, I should've edited my previous post instead of replying.
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Forgot to mention I also ended up desaturating the bright orange (lowest band on the background gradient) because I felt it was standing out a bit too much.
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