“Crispin wanted to go old school with the makeup. He had one eye taped back and hooks attached to his face and lower lip,” Guastini explains over on Facebook. “What you see here are subtle prosthetics that covered the apparatus that we life casted him in. From there Jeff Farley sculpted the appliances. Makeup designed by me and Mr. Glover. Makeup application and assistance by Julie Hapney who later took on a great deal of the application duties.”

Guastini also notes, “Before we went to set Crispin added that he wanted to be bald as well. So we added that late in the game for his reveal with a Bald cap prosthetic.”

Check out Guastini’s two Facebook posts covering Glover’s transformation for Smiley Face Killers below, which include behind the scenes photos as well as early concept designs.

Be sure to follow Vincent Guastini on Facebook and Instagram.

Inspired by true events and the twisted “smiley face killers” conspiracy theory that has gripped the American imagination for decades, this pulse-pounding serial killer tale reunites acclaimed director Hunter with his River’s Edge star Crispin Glover (Alice in Wonderland), and also stars Ronen Rubinstein (Fox’s “9-1-1: Lone Star”) and Mia Serafino (NBC’s “Crowded”).

In the film, “As a strange wave of mysterious drownings of male college students plagues the California coast, Jake Graham (Rubinstein) struggles to keep his life together at school. Finding himself stalked by a hooded figure (Glover) driving an unmarked van, Jake fears he may become the next victim in the killers’ horrific spree.”