合并/分离节点¶
这类节点本质上都是做同一件事情：
分离：将一幅图像的颜色通道分离成单独颜色通道。
合成：将单独的颜色通道 重新/合成 为单一的混合颜色通道。
此类节点可以独立操控单个颜色通道。在不同的 色彩空间 中每种类型之间是有差异的。
In compositing and texture context each node supports the Alpha channel. In the texture context only RGB color space is available. In the shading context of Cycles combine and separate nodes are added for HSV and vectors (XYZ).
The Combine nodes can also be used to input single color values. For RGBA and HSVA color spaces it is recommended to use the RGB节点. Some common operations could easier be executed with the 颜色类节点.
