软阴影与反锯齿有着深刻的关系，PCF在Graphics上原本就是一种反锯齿技术，而它在阴影算法上往往作为简捷的软阴影达成途径。VSM（Variance Shadow Map）同样旨在解决这一问题，但它并非对阴影图的后处理而是重新定义阴影图。
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