PF_A_INV=(1<<7), //!< If set, the alpha channel is stored as 1.0-a
PF_Z_INV=(1<<8), //!< If set, the ZDepth channel is stored as 1.0-z
PF_A_INV=(1<<7), //!< If set, the alpha channel is stored as 1.0-a
PF_Z_INV=(1<<8), //!< If set, the ZDepth channel is stored as 1.0-z