How can I reproduce this painting effect?
I know (think) there is an additive you can put in paint or a glaze to give it the crack effect.  Or I believe it is hand painted sometimes.  

http://www.diynetwork.com/how-to/how-to-apply-a-crackle-finish/index.html
http://makethebestofthings.blogspot.com/2010/05/crackle-finish-with-elmers-glue.html