为了解决此问题，WPF 提供了一种将可视化树中的对象边缘与设备像素“对齐”的方法，从而消除了抗锯齿产生的软边缘。
To address this issue, WPF provides a way for object edges in a visual tree to "snap" to device pixels, eliminating the soft edges produced by anti-aliasing.
抗锯齿的计算是基于beauty通道，所以当建筑细节隐藏在阴影中，它没有足够的样本进行计算，此外增加的通道也是边缘变得弯弯曲曲。
Its calculation is based on the beauty pass so whenever a detail was in shade it didn't use enough samples there and the additional passes had zigzagged edges.
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