@Richardson -

Koyuki is a good reference, because she has those classic eyes.

 

Generally speaking, looking at the inner corner of each eye, the upper lid fold protrudes over the lower lid. As I mentioned in an earlier post, the lower inner corner appears to be behind the fold of the upper lid corner.  The latter itself ends below the lower eyelid level, thus giving the impression that the eyes are slanted with lower inner corner and (virtual) higher outer corner.

The challenge for creators of realistic Far Eastern characters, is to make their custom morphs more accurate in depicting such classical epicanthic folds, without making the face appear unnatural or weird.

Eternal Hobbyist