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SKY EXPOSURE FACTOR
Sky Exposure refers to the sky seen by a point in space
The percentage of the sky that is visible from the points of the input geometry (as opposed to Sky View. which is the amount of sky seen by a surface). This is equivalent to a solid angle or even-spaced ray-tracing calculation from the point.
WHY IS IT IMPORTANT ?
It is useful for evaluating one’s general visual connection to the sky at a given point and should be applied to cases where direct views to the sky are the parameter in question.