Despill to Color

in todays quick post I want to introduce you a very handy tool/Gizmo for Foundry Nuke that has saved me a lot of trouble when removing green/blue screen.

If you are trying to fix an objects edge, by bringing back its original color, then this tool is perfect for you! DespillToColor is designed to work best with a specific user defined screen color and therefore a good local solution for certain areas of your plate.

- pick a blue- / greenscreen color - set or pick a target color.

- 'balance' controls how much red tones are being affected by the despill operation opposed to blue and green tones.

- Increasing the 'gain' will affect a wider range of colors, like the finetune knob in DespillMadness.

- Although using 'erode' and 'falloff' - hidden in the info tab -  is not recommended it can be a nifty cheat in rare cases. - like when dealing with edge artefacts in the plate.

Gizmo vs Group

For the sake of quickly trying this tool I uploaded it as a group node. Just download and drag and drop it into your node graph.

If you decide to use DespillToColor more often I recommend converting the group into a gizmo. Unlike a group that is loaded from the toolsets a gizmo will always automatically show its controls in the properties panel on creation. How to create a gizmo > https://youtu.be/mGS9viVddMk

Example pics: (For testing I recommend blurring these jpegs a little to get rid of compression artefacts.)

http://johannesmasanz.com/files/despillToColor/greenscreen.jpg 

http://johannesmasanz.com/files/despillToColor/bluescreen.jpg