Start with default scene with a cube object.

用一个立方体物体从默认场景开始。

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The tutorial seems to be using a default camera for the Raycast, make sure you have a camera in the scene that has its Tag set to Main camera.

本教程是使用默认的相机对光线投射，确保你的场景中的摄像机，其标签设置主相机。

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NOTE: By default if you don't create any occlusion areas, occlusion culling will be applied to the whole scene.

注意：默认如果你没有创建遮挡区域，遮挡剔除将应用到整个场景。

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By default, and because it was the first on the scene, LinkedIn is sort of our Mitochondrial DNA for how we connect in the business world.

FORBES: Beyond LinkedIn: Putting Relationships To Work With Datahug