I don’t recall much about her nude scenes. Didn’t make much of an impression, I guess...
Now, Lena Headey on the other hand... yeah, buddy!
Headey didn't do any nude scenes. They spliced her head onto someone else's body. She claimed she was fine doing it herself but she had the flu or some such nonsense. There was no way she was going to do a full nude scene walking down the road with people throwing food at her.
Clarke's nude scenes were well done and tastefully inline with the genre and the story. She was very young and had/has an excellent body so no harm no foul. Of course the porn sites stole the footage and used it to make money but that's not on Clarke.
You DO realize that they used a body double for many of her nude scenes, including the infamous “Walk of Shame”?