I would love to see functionality for users to upload their own skins to the 3D dice. This could manifest in two ways: First, you could implement a way for users to upload their own images into a limited and simple template. This would encourage and enhance creativity in users. Second, this would open up a whole new avenue for artists and creators to contribute to the Roll20 Marketplace. Especially for those very talented folks who can make cool animations and special effects on the dice. Since each user chooses whether to have 3D dice displayed on their own tabletop, this functionality would not be intrusive to those who either don't want to or perhaps don't have the system resources to run them. Thanks for your consideration!