Japheth said:1. We have no idea what Christ looked like, so any image is a false image of him.
2. During the 6th and 7th Century during the Iconoclastic Controversy the decision made by the Iconoclast was that we cannot make an image of Christ because of his Divine Nature. Even if we knew what Christ looked like and was able to paint a picture of him we would be dividing his nature.. Christ is fully God and fully Man. If we paint him we are painting only the man for we can not paint his divine nature thus dividing his nature.
At the very least it is nestorianism and it could also be monophysite...
So it is still forbidden....
That is my two cents for what it is worth....
1. I think you're assuming an "image", such as a small baby in a toy manger, is the same thing as what the Bible condemns when talking about making an image of God for the purposes of worship.
2. At the very least....you are looking way to much into this if you use all of those big words to come to a conclusion about having a ceramic baby to include in your manger.