Sometimes the cleanup is a last minute job that could not be completed during production. In "Fever", time constraints forced the production team to rely on Entity FX to create the Talon marquee that hangs outside of the building, something that they typically do not do. While filming the shots in Hamilton's lab that involved kryptonite, the special effects team had to go in during post-production for "Duplicity" and make the kryptonite glow, because the material used in production to make the kryptonite glow did not photograph well. A last minute change in the storyline for "Skinwalker" required Entity FX to digitally adjust the opening teaser. In the original scene that was filmed, a wolf watched the aftermath of an explosion at the LuthorCorp construction site. It was decided that the wolf would watch the explosion as it happened, so Entity FX had to go back to the scene and recompose it. Hiding the head of the trainer who was holding onto the wolf, Entity FX digitally corrected the color composition and the lighting around the wolf so that it appears as though the explosion was occurring right in front of the wolf.