From the Shake reference; this is a Macro tut about creating a macro called “RandomMove”
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To add an icon to the button, do the following steps:
Create a 75×40 pixel image in Shake.
Strip out the Alpha channel, which can be done with a SetAlpha node with a value of 0.
Set the FileOut to your /nreal//icons directory, naming it TabName.Name.nri. In the above example, it would be called Transform.RandomMove.nri.
Render the file.
In the RandomMoveUI.h file, remove the @ sign on line 3.
Save the text file.
Relaunch Shake, and RandomMove has an icon.
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There you go! 😈