If green needs to appear in the foreground, use blue. If the subject needs to wear blue shirt, use green. Is it green or blue better? The real issue is what color you need to have in the foreground. Attention to details is what makes the shot believable.
However, for realistic shots, you need to know what the composited background will be and how the lights fall in it. Weatherman-style shots, in which informational graphics appear behind the host, really can be lit any way you want. Many chroma-key composites are intended to look fake and not simulate reality. If either one is off, no matter how clean the key is, the viewer will feel that something doesn’t belong to the scene. Both background and foreground need to use the same lighting angles and have the same perspective. Both setups are critical to the effectiveness of the final product – the background lighting for a successful composite and the foreground lighting to sell the integration of the subject within the composited background. There are two lighting setups for a chroma: one for the background and one for the subject in the foreground. In fact, inconsistency between foreground and background lighting is a major visual cue that will give away a composited greenscreen shot. However, the foreground should be lit very carefully in a manner that will match the composited background. This misunderstanding arises from the need to light the background evenly. The typical misconception is that greenscreen shots must be flat lit. The Green / Blue screen is a very fascinating element for all kind of media productions because it opens the way to a wide imagination and the creation of impossible shots. You may need to adjust the color similarity value to get the transparency just right.LIGHTING A CHROMA KEY (BLUE OR GREEN SCREEN).If your green screen color doesn’t quite match the default green, use the color dropper icon to select the color you want to make transparent in the preview pane.The green screen will be automatically keyed out.Make sure the Chroma Key box is checked.Double-click on the Overlay Track on the timeline and click on the Chroma Key tab.To adjust the size of the overlay, right-click on the overlay on the preview pane and select Fit to Screen or other size option.Drag the green screen footage onto Overlay Track 1.Drag the background you want to use onto the Video Track on the timeline.A common example of the use of chroma key is a weather forecaster (overlay) in front of a weather map (background). The technique involves removing a specific color (usually green or blue) from the around the subject in the overlay to allow the background video or image to show through. Part Two: Chroma Key and Working with Green Screen FootageĬhroma Key, also called chroma keying or color keying, is an editing technique for combining two video clips or images: an overlay and a background.
#CHROMA KEY PLUS#
To use the free sample mask provided with this tutorial, click the plus sign to the right of the mask library, browse to the location on your computer where you saved the mask file and click Open.
Double-click on the overlay you want to edit on the timeline which will bring up the Edit tab.
#CHROMA KEY HOW TO#
How to Add Transparency or Borders to Overlays
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