Singleton has accused Hollywood of trying to "homogenise" black film-making.
"They want black people to be who they want them to be, as opposed to what they are. The black films now - so-called black films now - they're great. They're great films. But they're just product," he told the Hollywood Masters Interview series in 2014.
"They're not moving the bar forward creatively … when you try to make it homogenised, when you try to make it appeal to everybody, then you don't have anything that's special."
