The Vignetting image effect introduces darkening, blur and chromatic aberration (spectral color separation) at the edges and corners of the image. This is usually used to simulate a view through a camera lens but can also be used to create abstract effects.

渐晕图像特效变在图像的边缘和拐角区域进行变暗、模糊和色差 (光谱颜色分离)操作。这通常用于通过摄像机镜头的模拟视图，但也可用于创建一些特殊的效果。

Example of Vignetting and chromatic Aberration. Notice how the screen corners darken and color separation (aberration) creates purple and slightly green color fringing.
渐晕和色差的例子。请注意屏幕四角如何变暗，分色（色差）会创建紫色，略带绿色的彩色边缘。

As with the other image effects, this effect is only available in Unity Pro and you must have the Pro Standard Assets installed before it becomes available.

和其他图像特效一样，该特效只能在Unity Pro上进行使用，并且在使用之前必须安装Pro Standard Assets。

Properties 属性

Vignetting 渐晕

The degree of darkening applied to the screen edges and corners. Choose 0 to disable this feature and save on performance.
应用到屏幕边缘和角落变黑的程度。选择0以禁用此功能，并节省性能。
Blurred Corners 角落模糊

The amount of blur that is added to the screen corners. Choose 0 to disable this feature and save on performance.
应用到屏幕角落的模糊量。选择0以禁用此功能，并节省性能。
Blur Distance 模糊距离

The blur filter sample distance used when blurring corners.
使用模糊角落时，模糊过滤的采样距离。
Aberration Mode 色差模式

Advanced tries to model more aberration effects (the constant axial aberration existant on the entire image plane) while Simple only models tangential aberration (limited to corners).
高级模式将尝试模型有更多的色差效果（在整个图像平面上存在的恒定轴向像差）。简单模式仅模型切线色差（限制于角落）。
Strength 强度

Overall aberration intensity (not to confuse with color offset distance), defaults to 1.0.
总体色差强度（不要与色彩偏移距离混淆），默认为1.0。
Tangential Aberration 切线色差

The degree of tangential chromatic aberration: Uniform on the entire image plane.
切线色差的程度：在整个图像屏幕统一。
Axial Aberration 轴向色差

The degree of axial chromatic aberration: Scales with smaller distance to the image plane's corners.
轴向色差的程度：带有较小距离比例到图像屏幕的角落。
Contrast Dependency 对比度依赖

The bigger this value, the more contrast is needed for the aberration to trigger. Higher values are more realistic (in this case, an HDR input is recommended).
此值越大，越需要对比度的像差来触发。较高的值更逼真（在这种情况下，推荐使用HDR）

Advanced Mode 高级模式

Advanced mode is more expensive but offers a more realistic implementation of Chromatic Aberration.

高级模型更消耗性能，但提供更真实的色差。

The Advanced mode offers great control over our model of chromatic aberration -- also known as green or purple color fringing -- a common phenomenon in photography (also see image below).

高级模式提供了极大的控制模型的色差 -- 也被称为绿色或紫色的边缘 -- 摄影中常见的现象（见下图）。

Closeup view of color fringing. Note how around areas of great contrast purple and green shimmers seem to appear. This effect depends depends on the kind of camera or lens system being used. The effect is based on the fact that different wavelengths will be projected on different focal planes.

特写色差边缘。注意周围区域巨大的反差，似乎紫色和绿色的发光。这种现象取决于所使用的相机或镜头系统。这是基于正真实的效果，不同的波长被投影在不同的焦平面。

Hardware support 硬件支持

This effect requires a graphics card with pixel shaders (2.0) or OpenGL ES 2.0. PC: NVIDIA cards since 2003 (GeForce FX), AMD cards since 2004 (Radeon 9500), Intel cards since 2005 (GMA 900); Mobile: OpenGL ES 2.0; Consoles: Xbox 360, PS3.

这个特效需要显卡拥有像素着色器（2.0）或者OpenGL ES 2.0。台式机：2003年以后的NVIDIA显卡（GeForce FX），2004年以后的AMD显卡（Radeon 9500），2005年以后的Intel卡（GMA 900）；移动设备：OpenGL ES 2.0；控制台： Xbox 360、 PS3。

All image effects automatically disable themselves when they can not run on end-users graphics card.

所有图像特效如果无法在用户显卡上运行时将会自动被关闭。

Unity组件： 渐晕（和色差）

Unity组件： 渐晕（和色差）

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Unity组件：渐晕（和色差）

Unity组件：渐晕（和色差）