The older child is better able to ignore the shared contours and isolate the desired figure, but the complexity of the ground was always important, and ... a fish, or an elephant. ... Their method was to use a black-and-white checkerboard as a mask. A black-and-white checkerboard is 50% white and 50% black; if the white portion shines through, then the template allows 50% of the outline drawing to show.
|Author||:||Richard D. Walk|
|Publisher||:||Brooks/Cole Publishing Company - 1981-01-01|