kAmbientLight
kAmbientLight: 4
kCustomBackground
kCustomBackground: 17
kDistantLight
kDistantLight: 1
kEnvironmentBackground
kEnvironmentBackground: 16
kGradientBackground
kGradientBackground: 6
kGroundPlaneBackground
kGroundPlaneBackground: 8
kImageBackground
kImageBackground: 7
kImageBasedLightingBackground
kImageBasedLightingBackground: 12
kPointLight
kPointLight: 2
kSkyBackground
kSkyBackground: 11
kSolidBackground
kSolidBackground: 5