chroma key green screen/ blue screen film lighting techniques

chroma key green screen/ blue screen film lighting techniques

Lumos by DMLite – LED Lighting Technology
slide show(5 pics) + video1(BTS) + video2(BTS)

chroma key (green screen vs blue screen )

From Wikipedia

In order to create an illusion that characters and objects filmed are present in the intended background scene, the lighting in the two scenes must be a reasonable match. For outdoor scenes, overcast days create a diffuse, evenly colored light which can be easier to match in the studio, whereas direct sunlight needs to be matched in both direction and overall color based on time of day.
A studio shot taken in front of a green screen will naturally have ambient light the same color as the screen, due to its light scattering. This effect is known as spill

The biggest challenge when setting up a bluescreen or greenscreen is even lighting and the avoidance of shadow, because it is best to have as narrow a color range as possible being replaced. A shadow would present itself as a darker color to the camera and might not register for replacement. This can sometimes be seen in low-budget or live broadcasts where the errors cannot be manually repaired. The material being used affects the quality and ease of having it evenly lit. Materials which are shiny will be far less successful than those that are not. A shiny surface will have areas that reflect the lights making them appear pale, while other areas may be darkened. A matte surface will diffuse the reflected light and have a more even color range. In order to get the cleanest key from shooting greenscreen it is necessary to create a value difference between the subject and the greenscreen. In order to differentiate the subject from the screen, a two-stop difference can be used, either by making the greenscreen two stops higher than the subject, or vice versa……

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chroma key green screen/ blue screen film lighting techniques

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