Plotting Electric Fields with Line Integral Convolution

Several configurations of charges are plotted using the line integral convolution algorithm. In each case, it is possible to observe different charateristics of the fields. Bands of the same color stand for equipotential curves. Try to recognize whether they are positive or negative and determine their relative sizes.

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Reference
[1] Wikipedia. "Line Integral Convolution." (Mar 22, 2013) en.wikipedia.org/wiki/Line_integral_convolution.
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