Everyone can read his personal theology into art, of course. My comment was regarding early Renaisance; I am not a big fan of late and Northern Renaissance; the authentic Renaiissance ended, I believe, with Memling, and what remained was in transition to mannerism. Regarding Protestant influences later on, perhaps.
What makes early Renaissance Catholic is not just the deviotional nature but also the celebration of humanity in its joyful redeemed state. That incarnationalism is wholly foreign to Calvin, but can be mistaken for humanism, especially by secular or Protestant art critics.
This is the joyful face of the Church:
Madonna and Child
Alessio Baldovinetti
1460-65
Wood, 106 x 75 cm
Musée du Louvre, Paris
By the way, anyone wondering why the Catohlic Church is "she" needs to look at this or similar painting.