png 120 120 hw2pixelclip.png
xyz -1.2 -1.2 0.6
xyz 0.9 -0.9 1.1
xyz 1.1 1.3 0.6
xyz -0.9 0.9 -0.1
trif 1 2 3
color 1 0 0
trif 1 3 4