Blasphemy? Nope.
But have you ever noticed the faces on these models? They look at us from some vast self-perceived superiority of existence, looking at us as we might at a grub wiggling in the sunlight after a log has been turned over. They are annoyed at us for daring to look at them, and they would vaporize us with their beauty if they could. Their faces also hold an expression of sullen lust, and they scarcely bother to wait for us to look away before they indulge.
As for this Dan Brown bird, holy cats. How do you say Drivel in Elvish? I don't know why trees need to be cut down to make paper to print this stuff on.
There was a similar book, almost as badly written, a few years ago, called, "Holy Blood, Holy Grail". I toiled through it, and thought, "What twaddle." Since Mr. Brown's opus appeared, and since it caused such a fuss, I gave it a go. Ick. Ick. Ick.
I have no sentimental attachment to the story of Jesus as most of us know it. No attachment of sentiment or belief, I have not one Christian bone in my carcass. But I would take up the cudgels with the French church over Mr. Brown, should they leave the silly advert alone and go after him. The Da Vinci Code is a NOVEL, and a very bad one. It is not history. It is SO not history that it belongs .... in that vineyard, cleaning up Ted's mess.
I realize that there are may be people who think it's "real". It isn't. While the Bible may not be "true", it's truer than The Da Vinci Code.
As for Leonardo, well, Jesus was 1500 years in his past. He wasn't painting from life.