Explosions
The example forest fi re shot also contains a large explosionin a clearing. There is not a huge fundamental difference
between the methods to composite an explosion
and mere fi re, except that a convincing explosion might
be built up out of more individual elements. It is largely a
question of what is exploding.
All explosions are caused by rapidly expanding combustible
gases; implosions are caused by rapid contraction.
Just by looking at an explosion, viewers can gauge its size
and get an idea of what blew up, so you need to design the
right explosion for your situation or your result will be too
cheesy even for 1980s television sci-fi . How do you do it?
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