Specify the red, green, blue, and alpha values used
when the accumulation buffer is cleared. The
initial values are all 0.
DDDDEEEESSSSCCCCRRRRIIIIPPPPTTTTIIIIOOOONNNN
ggggllllCCCClllleeeeaaaarrrrAAAAccccccccuuuummmm specifies the red, green, blue, and alpha values used by
ggggllllCCCClllleeeeaaaarrrr to clear the accumulation buffer.
Values specified by ggggllllCCCClllleeeeaaaarrrrAAAAccccccccuuuummmm are clamped to the range [-1, 1].
EEEERRRRRRRROOOORRRRSSSS
GGGGLLLL____IIIINNNNVVVVAAAALLLLIIIIDDDD____OOOOPPPPEEEERRRRAAAATTTTIIIIOOOONNNN is generated if ggggllllCCCClllleeeeaaaarrrrAAAAccccccccuuuummmm is executed between the
execution of ggggllllBBBBeeeeggggiiiinnnn and the corresponding execution of ggggllllEEEEnnnndddd.