Computer-generated imagery
Computer-generated imagery (CGI) was used extensively throughout the film to create environments and elements, such as bullet holes and flames. More dangerous objects such as a taser or the handcuffs used to strangle Winter were also made from CGI. Five companies were responsible for visual effects. The two most involved were CIS Vancouver and Framestore. CIS Vancouver recreated the White House since the crew did not have permission to shoot in the building, and made a digital elevator shaft for the scene where Salt goes down into the White House bunker. Framestore was responsible for the assassination attempt on the Russian president, which combined actual shots of St. Bartholomew's Church, a digital recreation of the church's interior, and scenes with actor Olek Krupa falling down a collapsing floor.