I think that when it comes to the defenition of pornography, it depends on what the intended reaction is.
If you create a work with the sole purpose of people getting off; then that in my opinion is pornography. However, if you create a piece that happens to have nudity in it, but you are trying to convey some other artistic expression, then it is not.
But that I suppose all depends on how well the artist can convey their idea. Besides, if nudity is not just in nature on Earth but on Calypso as well (i.e. Boorums), then nudity itself is not pornography. But then of course, the discussion starts as to what is "tasteful" etc.... a whole new can of worms
Cheers,
Iset