Shortly after the launch of the Language of Painting, we released an additional Gradation Block Model sheet approximating some “fleshtones”. You can download the sheet here:
LINK: http://anthonywaichulis.com/wp-content/uploads/2017/02/LOP_GBlock_Model_Sheet_4_fleshtones.pdf
Here is a demonstration from artist Kevin Moore (@Kevin_Moore) tackling Block #16:
Artist Kevin Moore tackling the Fleshtone Gradation Blocks