nudist and naturist the latter implies a motivation for being nude

the term nudist seems to mean one who is often  nude but it gives no indication oF the motivation of being often nude:
the term naturist seem to mean someone with something to do with nature.
If one found out a naturist often went nude; they would asume it was motivated by the desire to be "like nature". or "natural in nature."
so a nudist is nude for unknown reasons while a naturist is nude because of something to do with their alignment with the word nature