Hello. I'm starting to shoot portraits on 645 medium format (Bronica ETRSi) now since I've been shooting street and lifestyle for a while. My first two rolls were Portra 400. The first roll I shot with natural light and the second one with flash. I'm Asian and my model is Asian too, she have typical Asian skin tone. And the photos came out super yellowish, some have green tint in it, they also seems overexposed, but I was very careful with the meter, my digital test shots were well lit. It's so hard for my to adjust in post. I searched for some articles on Goolge but nothing useful really. Can someone here help me on this topic? Because I will mostly shoot my friends and Asian customers. I thought Fuji Pro 400H maybe works better than Portra for Asian skin tone. I ordered some roll of Fuji but in the meantime waiting for the shipping, I hope can learn something in here, what background color I should use, camera setting, light setup, meter,...