打开通道面板并点击图标来创建一个新的阿尔法通道。
Open the Channels Palette and click the icon to create a new AlphaChannel.
你的阿尔法通道应该在粗略剪切出的图形里填充白色。
Your Alpha chanel should fill with white in the shape of your roughly cutout image.
首先，你可能对视点替用特效的阿尔法通道感到疑惑。
First of all, you're probably wondering about the impostor's alpha channel.
在后期制作中我们不能达到这一点，因为在背景树的树叶上阿尔法通道会出现很多问题。
We couldn't manage this aspect during post production, because there would have been lot of problems with alpha channel on the leaves of the background trees.
这个纹理的阿尔法(alpha)通道作为一个遮罩，使光线在不同的地方有不同的亮度。
The alpha channel of this texture is used as a mask that determines how bright the light is at different places.
这个纹理的阿尔法(alpha)通道作为一个遮罩，使光线在不同的地方有不同的亮度。
The alpha channel of this texture is used as a mask that determines how bright the light is at different places.
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