Have you tried different colored lights?

Use a few mirrors and you'll catch every angle in one photo.

Or get artistic! Make a "Melancholic Hog" photo for some relatability or a "White Roman Sculpture Hog: Biggus Dickus" to appease that one mod who likes to poke fun at RETVRN memes.

Taking a pic of my genitals just to be able to remind you that if you wait 30 days, you can trick the system into accepting the same image twice. Don't do it too often though, sometimes it locks you out of your account.