enum LightSourceDefinition { Point = 0x01, Line = 0x02, Rectangle = 0x04, Circle = 0x08, EmitFromShapeMask = 0x0F, Spherical = 0x10, HemiSpherical = 0x20, Spot = 0x40, PhotometricWeb = 0x80, LightDistrMask = 0xF0 };