LumaKeyer DR

Author: Derek Rein - http://derekvfx.ca/nuke/

• https://github.com/DerekRein/.nuke/blob/master/ToolSets/lumaKeyer.nk

Original Tool by Derek Rein can be found on his github page.

Derek's tool is a simple slider controlled luminance keyer.

Additional features added:

1. Output options of the result to alpha or rgba
2. Smoothing settings which mimic the smoothstep options found in a ramp, smooth, smooth0, and smooth1, using colorLookup curves
3. Mask and mix options