Jeffrey Katzenberg, a producer of 3D films and one of the leading proponents of the format, blames oversaturation of the market with inferior films, especially ones photographed conventionally and then digitally processed in post-production. He claims that such films have led audiences to conclude that the format is not worth the often much higher ticket price. Daniel Engber, a columnist for "Slate", comes to a similar conclusion: "What happened to 3-D? It may have died from a case of acute septicemia—too much crap in the system."