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Welcome to Chroma Key Tv
  As our name says, this site is all about Chroma Key; "The process of overlaying one video signal over another, the areas of overlay being defined by a specific range of colour, or chrominance, on the background signal" (Quantel Digital Factbook).
On this site we've collected information, content, software, and links to other relevant Chroma Key resources. The Litering is a component of the Chromatte system, it is the ring of LEDs that shines onto the material. If there is any additional information missing from these pages that you think is relevant, please feel free to send an email to
What are Virtual Sets?
  Virtual Sets use green screen keying to create a sets or stage that isn't real, and in some cases could not be. Virtual Sets are ideal for situations where a real sets is too expensive because of either space, location, or materials cost. Building a football stadium would be very expensive. Building a football stadium made of gold on the moon would be impossible, but not with virtual sets. A small stage covered with green screen and adequate lighting is all that's needed to make Virtual Sets and put your talent anywhere your imagination wants to put them.  
Live or Post?

Virtual Sets can be done either live or in post production, each has advantages and disadvantages. In a live production with something like an Ultimatte Chroma Keyer or the keyer in a switcher the two main advantages are that your talent can see where they are going in the Virtual Sets and you can light your talent for the sets they are in. So your talent doesn't walk through a pillar or desk and lighting can be fine tuned to match the image they are being Chroma Keyed over.
In post the main advantage is control over your Virtual Sets. You can use a wider array of tools available in the various compositing and nonlinear editors to Chroma Key, color correct, and even pan and zoom on the composited Virtual Sets.