Nudity, including artistic nudity, is in itself the complete opposite of pornography. One is human nature, with art depicting its beauty and purity, while the latter is about the gratification of lust.

As a Christian, pornography is clearly sinful and harmful. But if you wish to use your free will to partake in it, then you do you. Non-consensual pornography (which is what this is about) causes harm to another person, which is why it cannot be tolerated.

This should be obvious IMO.