It appears that going back and forth between outfits in CAS may fix this problem. Unable to change eye color in The Sims 4 Fix 1 – Change the outfit In this guide, we’ll explore why that happens and how you can fix it. Basically, you can change your Sims’ appearance as you want.īut sometimes, gamers can’t change their Sims’ eye color. When you choose a face shape for your Sim, you can change a series of traits, such as the shape of the nose and eyes, the eye color, the chin shape, and so on.