Answer:
in the late 1960s........
I think the word think or your inference or prediction
The orthogonal lines in the work merge at the vanishing point. In a perspective drawing, the artist uses parallel diagonal lines which meet and diminish to a vanishing point. These lines are called orthogonal and create the perspective and a more realistic view. The vanishing point offers the painting a three-dimensional look.
D maya and Chinese guardians ,and so on
