Motion Blur 运动模糊 后期处理系列6

Motion Blur 运动模糊

本文档主要是对Unity官方手册的个人理解与总结（其实以翻译记录为主：>）
仅作为个人学习使用，不得作为商业用途，欢迎转载，并请注明出处。
文章中涉及到的操作都是基于Unity2018.3版本
参考链接：https://github.com/Unity-Technologies/PostProcessing/wiki/Motion-Blur

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

Property	Function
Shutter Angle	The angle of the rotary shutter. Larger values give longer exposure therefore a stronger blur effect.
快门角度	旋转快门的角度。值越大曝光时间越长，因此模糊效果越强。
Sample Count	The amount of sample points, which affects quality and performances.
采样数量	采样点的数量，它影响质量和性能。

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