The yellow turbans, I believe, but i dont really know.
Church restrictions on bodies: it was sinful for a person to be without clothing in front of an artist. To create realistic paintings, corpses were used.
Corpses were used as a model for the human body. Renaissance painters strove for realism and the corpse provided a realistic human image. An alive person would not be able to pose, in particular without clothing, for a painter. This would have been sinful.
