To start, check out these handy templates which ROBLOX themselves has created. If you right click and save these images, you can use them as a guide on how the clothes should look once you upload ...

In the case of the aforementioned avatars, it's possible to use all types of wearable accessories to make them look however you deem fit. If the question "how to make your own Roblox character?" ...

Roblox is updating the look of its materials, making textures more lifelike but letting developers stick with the old visuals if they prefer.