Songs of Survival is a soundtrack for the third season and it was released on August 27, 2013, by Republic Records as a Walmart exclusive for the special edition release of the third season. Songs of Survival, Vol. 2 is a soundtrack for the fourth season and it was released on August 26, 2014, by Republic Records as a Walmart exclusive of the fourth season release. Makeup Greg Nicotero is an executive producer and the key special effects makeup artist on the series. Each walker is put through "zombie school" and is taught how to move like a zombie. There are three levels of zombie makeup: Hero, Midground, and Deep Background. Hero zombies are featured walkers and are completely made over from head to toe. Midground zombies get highlights and shadows on the face, but do not get close enough to the camera to require full makeup. Deep background zombies often wear masks and are only meant to be used as a backdrop. Filming The Walking Dead is predominantly filmed in Georgia. Since 2002, the state has offered a tax incentive for large film productions to drive producers to the state and bolster its economy. The first season was shot primarily in Atlanta, but required a great deal of coordination with the city to shut down streets and parks for filming. Production for subsequent seasons moved mainly to Riverwood Studios (doing business as Raleigh Studios Atlanta), a plot of land covering approximately , located outside of Senoia, Georgia. Some existing buildings were used here, such as a subdivision that is used by several families, which serves as the Alexandria Safe-Zone. Other buildings are constructed as sets, such as the exterior shots of the main Hilltop mansion, the trash heaps used by the Scavengers, or Father Gabriel's church. Sets are torn down when no longer needed; the church, after its use in the fifth season, was removed and its spot used for the iconic setting for the first meeting between Rick's group and Negan in the seventh season. The property includes sound stages constructed for interior shots, which then may be reused; the interior sets for the prison during the third season were reused to serve as the buildings and sets for the Savior's Sanctuary in the seventh season. In July 2017, AMC purchased the studio lot from Riverwood for $8.25 million. Some scenes are shot outside of the studio. Woodbury,