How Do you make a vampire's eye color change?

[EtherealWitch]

HOW TO: Use the previews and unpreviews directing command

The previews/unpreviews feature: This is a directing command in which you can get a character to change out of their original look into something else and then after a while, you can change them back to how they were before. It only works in one episode where you can unpreview/preview outfits and/or features. In the next episode, it automatically defaults to what they originally wore/have regardless of whether you previewed it and let it stay previewed for the entire previous episode. Perfect …

here!