Let's go outdoors.

Extend a few lines and the blue line now becomes the 'horizon line'.
add a few visual clues ... try it

... a railway line, telegraph posts and suggestions
of clouds. Please refer to 'drawing' section lesson 5 called 'raliway'
for the practical lesson that accompanies this theory sheet.

Let us look at the structure again ... and draw a cube ... and
...

... indicate a light source and plot a shadow (it gets complicated
very quickly doesn't it? To plot the shadow drop a vertical line from
the light source. From where it hits the ground radiate lines from
that point to intersect lines from the light itself.) Note
the method of drawing ellipses on the surfaces of the cube. When you
feel comfortable try drawing and plotting the shadow of an archway
using two point perspective. Please refer to 'drawing' section lesson
8 called 'shadows' for the practical lesson that accompanies this
explanation or theory lesson. Let's stay outdoors...
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