Changes

The red, green and blue samples behave like any RGB-defined color, but the STP (semi-transparency processing) bit has varying special meanings. Depending on the current semi-transparency processing mode, it denotes if pixels of this color should be treated as transparent or not. If transparency processing is enabled, pixels of this color will be transparent (not rendered) if the STP bit is set. A special case is black pixels (RGB 0,0,0), which are '''by default ''' are treated as transparent by the PlayStation ''unless'' the STP bit is set.