•Gradient on surface implies
changing surface orientation (vs. changing surface color)
•Use “light comes above
rule” to further determine shape of surface
Which circle looks
like disk? Sphere?
Grinch-like figure
from http://www.cs.stevens.edu/~quynh/courses/cs638-sp05/drseuss_kowalski.pdf
PROGESSIVIZE
Vision: extracting
shape from shading
Artists use this in
induce 3d—literally creatign sense of shape from shading
