0,0 should be a grey sphere on a black background (default)
1,0 should be a partial grey sphere in the lower right corner, black background (Absolute)
2,0 should be a grey sphere on a black background (RelativeToBoundingBox)

0,1 should be identical to 1,0
1,1 should be identical to 1,0
2,1 should be identical to 2,0