Linear Perspective.
In Chapters 6 and 7, the laws of one- and two-point perspective were discussed. These principles
pertain to the landscape, even when man-made, geometric objects are not present.Now that we know the eye level and horizon line are vital to creating a convincing three-dimensional space, it is usually diffi-
cult to recognize where vanishing points might occur, unless a landscape contains fences or rectangular plots of land, such as
those you would find on a farm.
However, look very carefully, and there are almost always some clues showing you shapes converging toward vanishing
points. A few of these shapes would be clouds and cast shadows from objects such as trees, clusters of flowers, or similar
growth.
Of course, all objects, whether concrete or amorphous (such as clouds), will diminish in size as they converge to the vanish-
ing point on the horizon line. This is called scale. Having the correct scale of objects as they recede in space is crucial to con-
structing a believable three-dimensional space. This is why determining your horizon line and vanishing point is so important.
It will help you reduce objects as they recede spatially so that they remain proportional to each other.
Study after Peter Paul Rubens’ A View of Het Steen in the Early Morning,by Dean Fisher