淡出为黑场
从一个场景（镜头）到另一个场景（镜头）的过渡，一个常用手法是 "淡出到黑场" 。就像它的名字所指的那样，场景逐渐淡出，屏幕变黑。用户也可以 "淡出到白场" 或任何想使用的颜色，但是黑色是一个比较好的折中选择，在视觉上起到 重新开启 观看者的思路。如下的节点连接图显示了如何利用设置Alpha节点做淡出到黑场效果。
淡出为黑场。
In the example above, the alpha channel of the swirl image is ignored.
Instead, a Time Curve node
introduces a factor from 0.0 to 1.0 over 60 frames, or about 2 seconds,
to the Set Alpha node. Note that the time curve is exponentially-shaped,
so that the overall blackness will fade in slowly and then accelerate toward the end.
The Set Alpha node does not need an input image; instead, the flat (shadeless) black color is used.
The Set Alpha Node uses the input factor and color to create a black image that has an alpha
set which goes from 0.0 to 1.0 over 60 frames, or completely transparent to completely opaque.
Think of alpha as a multiplier for how vivid you can see that pixel.
These two images are combined by the Alpha Over node completely (a Factor of 1.0)
to produce the composite image. The Set Alpha node will thus, depending on the frame being rendered,
produce a black image that has some amount of transparency.
Setup and animate, and you have an image sequence that fades to black over a two-second period.
Note
没有可使用的场景信息
范例的节点连接图没有使用渲染层节点。生成2s动画，没有Blender场景信息被使用。这是使用Blender从建模到动画的强大合成功能的实际范例。(渲染层可以代替图像图层， "淡出节点连接网络" 特效也同样可以实现相同的效果）