 Tom Woodruff Jr. and Alec Gillis, head of special effects studio Amalgamated Dynamics, Inc. (ADI), who previously worked on 2004's "Alien vs.Predator" and 2007's "," did not return for the creature design of "Predators", nor did Stan Winston Studios.Instead, KNB EFX's Howard Berger and Greg Nicotero took over building the creature suits.