Color Key
色键
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色键

To free image elements from the background more easily and mask them out, frequently used homogenous colors are used in the background while the photo or video material is created. If no alpha information is available, the Color Key Node can use a selected color for masking.
为了使图像元素更容易地从背景中释放出来并遮住它们,在创建照片或视频材质时,经常使用的同质颜色被用在背景中。如果没有 alpha 信息可用,则 Color Key Node 可以使用选定的颜色进行屏蔽。