Stormy rainclouds
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1. Paint a patch or two of yellow ochre, then surround these
with a watery mixture of ultramarine blue and cadmium red
(it should be a dull purple). Also add in a mix of ultramarine
blue and burnt sienna (a blue-grey). Keep everything very
wet and allow the colors to mingle naturally on the paper.
3. While the paint is still wet drop in some other dark
blue-greys made from the same mixes as before and
allow the paint to run down the paper (remember to
have your paper on a slope).
Just allow the sky to develop by itself, and although you
may need to prod and poke a little here and there, try
not to mess with it too much.
2. Continue painting until the whole sky is covered with a
wet wash of color.
Dark clouds
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1. Using a flat brush which creates sharp edges, paint in a couple of patches of yellow ochre, and then surround these
with a roughly painted area of a dull purple made from ultramarine blue and a hint of cadmium red. Brush it on
loosely, leaving white areas.
You can soften the edges of some of the clouds
towards the horizon if you like.
Leave it to dry completely.
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2. Dampen the bottom half of the sky with clean
water, and then use a slightly darker mix of the dull
purple to paint in some darker cloud layers. They
will have crisp hard edges towards the top of the
sky and soft edges where you paint them into the
damp paper below.
3. Tidy up any edges that need to be tidied, but
don’t overdo it!
Here are two more examples of stormy skies