Do we have a command in the scriptures somewhere, thou shalt not do something schlocking? :-)
Now there's a passage I could get behind!
The interesting question to me is; Why is all religious art today terrible? It can't be lack of money. Does the subject no longer inspire? You could argue that art for the masses is alway bad. But then why do we still flock to the Pieta?
This dude looks like he's late for a meeting of the Justice League.
"schlock" huh?
Sounds like a word likely to have been imported into English, from Yiddish.
Check Yiddish Talmud, if there's a prohibition, there may also be more than one sub-clause elsewhere, one to allow for it, and another to either recommend, or else commend some past usage of schlocky-ness.