Unmult is a plugin that allows you to create alpha channels from black or white backgrounds in your After Effects compositions. It is useful for compositing, keying, and adding effects to your footage. Unmult is available in two versions: the latest version is part of the Universe, Red Giant Complete, and Maxon One subscriptions[^1^], and the older version 1.1 is free and can be downloaded from the link below[^1^]. In this article, we will show you how to install and use Unmult plugin in After Effects CS6.
To install Unmult plugin, you need to copy the downloaded file to the appropriate folder in your system. Depending on your operating system and version of Unmult, the folder location may vary. Here are the steps for installing Unmult 1.1 on Mac and Windows:
UnMult.aex from the UnMult1-1.zip file to \Library\Application Support\Adobe\Common\Plug-ins\7.0\MediaCore\.UnMult.aex from the UnMult1-1.zip file to C:\Program Files\Adobe\Common\Plug-ins\7.0\MediaCore\.Note that Unmult 1.1 is not compatible with the latest version of Unmult, so if you have both versions installed, you may encounter some issues. Also, older versions of Unmult may not open in newer versions of Mac OS X, as Mac cannot identify the developer of older files. You can try to right-click the file and select Open, then open it with After Effects to bypass this problem[^1^].
To use Unmult plugin, you need to apply it to a layer that has a black or white background that you want to remove. Here are the steps for using Unmult plugin in After Effects CS6:
Unmult plugin is a simple but powerful tool that can help you create alpha channels from black or white backgrounds in After Effects CS6. It is compatible with other plugins and effects, and can save you time and effort in your compositing workflow. Try it out and see what you can create with it!
To give you some ideas of how you can use Unmult plugin in your projects, here are some examples of using Unmult plugin with different types of footage and effects.
One common use case for Unmult plugin is to use it with stock footage that has a black or white background. For example, you can use Unmult to remove the black background from a fire or smoke clip and composite it over your footage. Here are the steps for doing this:
Here is an example of using Unmult with a fire stock footage:

Another common use case for Unmult plugin is to use it with text layers that have a black or white fill. For example, you can use Unmult to create a text reveal effect by animating the text layer's opacity and applying Unmult to it. Here are the steps for doing this:
Here is an example of using Unmult with a text layer:

A more creative use case for Unmult plugin is to use it with Fractal Noise effect to create organic shapes and textures. For example, you can use Unmult to create a cloud-like shape from Fractal Noise and use it as a matte for your footage. Here are the steps for doing this:
Here is an example of using Unmult with Fractal Noise:
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