A method for rendering lightning using conventional raytracing
techniques is discussed. A particle system is used to form a lightning
channel, and particular attention is paid to simulating the appearance of the
lightning, including the glow around the channel as well as the effect of
the lightning as it strikes an object. An object struck will also appear
to glow. This is achieved by using a scalar field from which both the glow
and the model can be derived.
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