Your skills as an artist should include the technique of constructing a drawing to give the appearance of spatial dimension on a two-dimensional plane.
Perspective theory attempts to regulate the appearance of the natural world with a constructive formula that makes it easier to draw. Linear perspective was developed in the Renaissance by such great artists as Brunelleschi, Masaccio, Donatello and Uccello. To the human eye, all lines appear to converge on a vanishing point at the horizon, and we see distant objects as much smaller than things that are close to. We know, for example, that a row of telegraph poles stretching away from us along a road are all the same height, yet, from our point of view, those closest to us appear larger than those further away. If our view is distant enough, the poles eventually seem to disappear altogether on the horizon. Here, and overleaf, are two of the basic systems of perspective for you to look at.
One-point perspective shows the apparent objects (blocks on the ground or in the air, and cylinders placed vertically or lying on the ground) with all the vertical poles diminishing in size as they proceed along the limiting lines of perspective towards a central vanishing point lying in the centre of the horizon. This creates an illusion, on the flat surface of a picture, of objects shrinking uniformly in scale as they recede in space and helps to convince us that we are looking at a genuine three-dimensional situation. Of course, these objects would have to be expertly drawn or painted to appear as convincing of their reality as a photograph.
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