that isthmus in the middle of the island is going to me an issue. both in 3d printing or in traditional casting techniques. that's a really thin chunk of material in that spot. have you thought about having some sort of outline around the whole pendant?
yes and in fact I am also considering turning the image into something whimsical again a solid background. I have an artist from freelancer.com working on turning the island into a dragon driving a Buick which I should have in a couple of days.