Here are the available body types for the butterfly avatars.
The basic avatar will just be this base colored to your OC there will be no added lines.

The custom avatars will be edited to match your OC, hair/tail/fluff spikes. Examples of those can be seen here:

Base 1 - https://www.furaffinity.net/view/36887927/
Base 2 - https://www.furaffinity.net/view/36898480/
Base 3 - https://www.furaffinity.net/view/36899519/
Base 4 - https://www.furaffinity.net/view/36897928/
Base 5 - https://www.furaffinity.net/view/36898015/
Base 6 - https://www.furaffinity.net/view/36897770/

If you're interested in one go to the journal on my main account here---> https://www.furaffinity.net/journal/9528996/

My main account can be found here-->  avinz