How does the "Frosted" Pattern on Uroplatus Work?

Hope everyone has a good New Years! I’ve been building an enclosure for a uroplatus ebenaui and trying to learn all I can. I think the whole genus is so cool looking, and would love to keep them! I was hoping that someone could explain how the “Frosted” pattern works? I’ve seen both Ebenaui and Phantasticus have this really cool pattern, so I’m wondering if it’s genetic or something else. I’m still doing my research, but I’m hoping to a Ebenaui in the spring.