Ok, so I decided to call it quits on my carnival mask. I did make the changes I noted before, so that the sides hopefully look like they curve around, like they would when the mask would be worn on someone's face. Added a little bit of reflection on the eye decoration, where the mask should curve. And more contrast on the feathery part, so hopefully it looks more like it curves around. I decided not to add more content to the image, like in Lazur's example, because I want the focus to be on the mask.