This gizmo lets you preserve the original grain from your plate after keying.

Sometimes making a matte after Denoising then copying it into your RGB plate just doesnt cut it. I usually like the fine edges result I get from the IBK keyer and would like to get back that original grain i removed from my foreground elements after keying.  

Gizmo / mS_RestoreGrain

Download: mS_RestoreGrain Gizmo

                     mS_RestoreGrain Toolset

How to install the Gizmo

Copy the contents of the folder to your .nuke folder

Then paste this in your

toolbar ='Nodes')
mS_Tools = toolbar.addMenu('mS_Tools', icon='LittleHelpers.png')
mS_Tools.addCommand('mS_RestoreGrain', 'nuke.nodes.mS_RestoreGrain()', icon='Grain.png')

How to install the Toolset

Copy mS_RestoreGrain.nk to your Toolsets folder which can be found here:

Windows: C:\Users\your-username\.nuke

OSX: /Users/your-username/.nuke