Drawing
a dirt texture is somewhat similar to grass. Only this time we
aren't using highlights at all. All you need to do is grab your
base dirt colour, spinkle some random darker dirt colours around
it and then another lot of random (lighter) dirt colours. An example
can been seen below.
Figure
4.8
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Other textures are created in similar ways. The best advice I
can give you is to look at real-life textures, or search for images
of textures using a search engine. Studying these photographs
usually helps you decide what to draw and where your shading and
highlights need to be.
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