: You can upload custom 3D models to the Roblox Creator Hub to sell them as items or use them as your personal character.
To "post" an avatar generally means to set a profile picture or share a digital character on social media or gaming platforms. Here is how you can do it across major platforms: Social Media avator
: You can create an avatar from a selfie or existing photo within the app's story or camera settings to use in videos and profile pics. : You can upload custom 3D models to
: You can create a 3D Meta avatar and use it as your profile picture or share it as a post. On Facebook, tap Menu > Avatars to create one. On Instagram, go to Edit Profile > Edit picture or avatar to sync or create a new one. : You can create a 3D Meta avatar
Step 7 - Building and uploading the avatar! ... If you're ready to upload your avatar for other users to see, choose the "Build & Upload an Avatar in Under 5 Minutes! | VRChat Tutorial