If you use Chrome, there's an extension that customizes the 3d dice: <a href="https://chrome.google.com/webstore/detail/custom-dice-for-roll20/hdjlljfnjnigpapdangkablekkoohdln?hl=en" rel="nofollow">https://chrome.google.com/webstore/detail/custom-dice-for-roll20/hdjlljfnjnigpapdangkablekkoohdln?hl=en</a> If you examine the source code in GitHub, you can figure out how to create your own skins for the dice: <a href="https://github.com/tobloef/roll20-fancy-dice" rel="nofollow">https://github.com/tobloef/roll20-fancy-dice</a> There's a bit of a learning curve involved tho if you're not familiar with coding JS.