Since these shapes are using a blending mode, it's important that they didn't overlap.

由于这些形状是使用混合模式，它的重要的是，他们并没有重叠。

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Since not all applications suit tiling, a more traditional stacking window manager mode is also available, allowing Windows to float at any screen location and overlap.

并不是所有的应用都适用瓦片式管理。传统的堆栈式窗口管理模式也是非常有效的。让窗口重叠和浮动于屏幕的任何地方。

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Note that light groups overlap; for example last per-pixel light blends into per-vertex lit mode so there are less "light popping" as objects and lights move around.

注意不同的光照组间有重叠，如，最后一个逐像素光源也以逐顶点光照模式的方式渲染，这样能减少当物体和灯光移动时可能出现的“光照跳跃”现象。

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