To what do we owe the second coming of the biblical epic?

A genre that was once as moldy as stale communion wafers has been reborn this year, first with Darren Aronofsky’s “Noah” and now with Ridley Scott’s “Exodus: Gods & Kings.”

More than 50 years after “The Ten Commandments” sandals are back in style. We can only hope the trend will culminate in a seemingly ordained bit of casting: Someone has got to make a Jesus film with Jared Leto.

The 3-D “Exodus” refashions Moses (Christian Bale) for modern times, giving us an elite, action-film combatant who’s less a conduit for God than a strong-minded individual whose beliefs mostly jibe with the deity who secretly appears to him.

“Exodus” begins promisingly, with a bald John Turturro in makeup. As the Egyptian pharaoh Seti, the father of Ramesses (Joel Edgerton) and king to Moses’ prince, Turturro (and the brilliant Ben Mendelsohn’s louche viceroy) gives the film a touch of camp, a necessary ingredient to any successful biblical epic. Scott ought to have kept it up.

However, the director of “Gladiator” and “Blade Runner” isn’t known for his lightness of touch, but rather a monochrome masculinity. His “Exodus” is action-heavy and more interested in the sheer computer-generated scale of the airy Egyptian palaces, the grotesque visitation of plagues (from the bloody Nile to the locust swarms) and the mass movements of the Hebrews.

Yet after Seti’s death and Ramesses’ ascendance to the throne, “Exodus” seems to lessen in scope, turning into a mano-a-mano drama between the stepbrothers Ramesses and Moses, who’s exiled after the discovery of his Hebrew birth.

For an epic, there are, at best, only two clearly seen characters in “Exodus,” with supporting players like Ben Kingsley (as a Hebrew elder), Sigourney Weaver (as Seti’s wife) and Aaron Paul (as a Hebrew slave) all but inconsequential. Let our people go?

The leads, you may have noticed, are uniformly white, which has spawned a good deal of deserved controversy not abetted by Scott’s defense that his stars were necessary for financing. The skin color of the ancient Egyptians, it should be noted, isn’t known certainly, and historical accuracy is never much a consideration to biblical epics. But that “Exodus” chose to ignore this issue of representation — which has a long dubious history in Hollywood — speaks to the film’s general lack of curiosity. It’s after spectacle, not questions.

Bale’s Moses is a reluctant, weary prophet. He may be the only actor who would barely bat an eye in scenes with the Almighty. Burning bushes don’t impress this Batman.

The most emotional moment of the film comes after it ends. Before the credits roll, Scott dedicates the film to his late brother, Tony Scott. It adds a tender dimension to the brotherly psychodrama of “Exodus.” But as a self-proclaimed agnostic, Scott would be better to leave Moses to a believer.