Case study: green screen

Editor Nial Brown talks us through the use of green screen in a Mitchell and Webb sketch and a London Olympics promo.

Filming a comedy sketch on location in a hot air balloon would be costly and impractical, and filming in an imaginary landscape is obviously impossible.

"Green screen can be used to create fantastic looks." – Nial Brown

That's where green screen comes in. The subjects are filmed in front of a green backdrop, then everything that is green in the shot can be replaced with the desired background, whether that's sky, road or an imaginary cityscape.