I sometimes struggle with differentiation happiness and sadness in eyes. I noticed that my model had leaned in, in a certain way, so I asked him to exaggerate that. The mouth was calm and forced.
Do you see him as sad? Sad is what I saw; sad is what he felt.
As part of my FACES project, my model decided to depict being shy after I asked him to tell me which emotion he picked. I guessed and then changed his body language to show him what I saw.
The eyes looked sad and thoughtful. The body look closed off and and overall I thought he looks sad.