{HEAD ~ The modified pixel color} is calculated by subtracting the level of gray in the original pixel color from each of the three original component color values and increasing {TAIL ~ any remaining color component values} as a function of the modified alpha value of the pixel 
is calculated by increasing
{ HEAD ~ The modified pixel color } is calculated by subtracting the level of gray in the original pixel color from each of the three original component color values and increasing { TAIL ~ any remaining color component values } as a function of the modified alpha value of the pixel
HEAD HEAD HEAD HEAD HEAD HEAD HEAD HEAD REL REL REL OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH REL TAIL TAIL TAIL TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH