To modernize its avatars, Roblox had to craft a new tech stack known as R15, because the newer avatars have 15 body parts compared to the old R6 models, which only have six.

Image shows one of the original R6 avatar types in "Roblox". These characters were made up of just 6 blocks and painted textures for clothing. Roblox Corporation Image shows an R12 avatar in Roblox.

The Roblox team discusses how the additions point to where Roblox is starting to flex across platforms, into VR, and eventually maybe AR too. Roblox Adds Avatar Calling on Phones, More Generative ...