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.

youdao

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.

youdao

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.

youdao