Stores depth and squared depth so that Chebyshev's inequality bounds the occluded fraction. The map becomes linearly filterable, so it can be blurred and mipmapped like an ordinary texture.
supersedescorrects · extends
classifiesspecializes · part-of
substitutes forapproximates · alternative-to
depends onrequires · validates
Colour is the family; a dashed line is the second member of it.
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