What did artist often do in their compositions as a result of the reformation

Reformation made artists include religious content in them. Making them religious-oriented.

Explanation:

The reason behind this answer is that in the first place, the church had too much power and they often said what it was good or not to be published. Therefore, we see many great pieces of art called classics religion-oriented. However if we observe them profoundly they have hidden messages. This was a very good mechanism artists created to rearrange their work so it could be accepted and they could keep creating. It was that or give up on their art career due to censorship.