motion-blur，为 运动模糊 。

定义：运动模糊特效可以增强渲染效果的真实感，模拟照相机快门打开过程中，拍摄物体出现相对运动时所拍摄的模糊效果，多用于表现速度感。还有一种情况，如果快门开启过程中照相机本身发生了运动，则会导致整个画面都产生模糊效果。同样，如果灯光发生运动，则会导致投影也发生模糊效果，只是这种现象一般不易观察。

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引申阅读：

Motion Blur is a common post-processing effect that simulates the blurring of an image when objects filmed by a camera are moving faster than the camera’s exposure time. This can be caused by rapidly moving objects or a long exposure time. Motion Blur is used to subtle effect in most types of games but exaggerated in some genres, such as racing games.

运动模糊是一种常见的后处理效果，它模拟了当摄像机拍摄的物体移动速度超过相机曝光时间时图像的模糊。这可能是由于快速移动的物体或长时间曝光造成的。运动模糊在大多数类型的游戏中被用于巧妙的效果，但在某些类型的游戏中被夸大了，比如赛车游戏。

Motion blur on a camera that rotates very fast

Properties

Performances

Using a lower Sample Count will lead to better performances.
使用较低的采样数量有利于性能。

Known issues and limitations

• Motion blur doesn’t support AR/VR.

Requirements

• Motion vectors
• Depth texture
• Shader Model 3

引申阅读来源：https://blog.csdn.net/cangod/java/article/details/86091611