Color Spill Node

../../../_images/compositing_node-types_CompositorNodeColorSpill.png

Color Spill Node.

The Color Spill node reduces one of the RGB channels so that it is not greater than any of the others.

This is common when compositing images that were shot in front of a green or blue screen. In some cases, if the foreground object is reflective, it will show the green or blue color; that color has 《spilled》 onto the foreground object. If there is light from the side or back, and the foreground actor is wearing white, it is possible to get 《spill》 green (or blue) light from the background onto the foreground objects, coloring them with a tinge of green or blue. To remove the green (or blue) light, you use this fancy node.

Inputs

Image

Standard image input.

Factor

Standard Factor.

Properties

Despill Channel

R, G, B

Algorithm

Simple, Average

Limiting Channel

R, G, B

Ratio

Scale limit by value.

Unspill

Allows you to reduce the selected channel’s input to the image greater than the color spill algorithm normally allows. This is useful for exceptionally high amounts of the color spill.

R, G, B

Outputs

Image

The image with the corrected channels.

Example

Results with the nodes applied to an image from the Mango Open Movie.

../../../_images/compositing_types_matte_color-spill_example-before.jpg

Before: green border and green reflections.

../../../_images/compositing_types_matte_color-spill_example-after.jpg

After: no unwanted green.