If we are talking early early then it was because art wasn't a form of "art" it was a form of communication.
But a little later down the road, people did not understand the human body and could not paint one perfectly, and also painters loved to show perfection, as in, gold everywhere, or a kind a top a thousand bodies. Something like that. So yeah...
The one that descries an overall effect of the Harlem renaissance is : Harlem renaissance spread African American culture to white Americans.
During this period, a lot of African American writers, musicians , and poets started to produce their masterpieces and spread their culture through it.
