Controlling Value
Nothing can compare with lighting for  
bringing drama and excitement to a
painting. At times, the art of making
pigment on canvas appear to radiate
light can appear almost magical. But
when you boil it down to basics - it is
really mostly about controlling value. By
"value" we mean - 'How light or dark?'

You are not going to create the illusion
of light just by piling on white paint.

The starting point is to envisage your
subject as if it were a 'black and white'
image. Although it may look a little
weird, I find squinting helps to do this.
Keep making comparisons - are the shaded parts of
the distant buildings lighter or darker than the
sidewalk, and so on.