Chroma key compositing, or chroma keying, is a visual effects/post-production technique for compositing (layering) two images or video streams together based on color hues (chroma range). The technique has been used heavily in many fields to remove a background from the subject of a photo or video -- particularly the newscasting, motion picture and videogame industries. A color range in the foreground footage is made transparent, allowing separately filmed background footage or a static image to be inserted into the scene. The chroma keying technique is commonly used in video production and post-production. This technique is also referred to as color keying, colour-separation overlay (CSO; primarily by the BBC), or by various terms for specific color-related variants such as green screen, and blue screen -- chroma keying can be done with backgrounds of any color that are uniform and distinct, but green and blue backgrounds are more commonly used because they differ most distinctly in hue from most human skin colors. No part of the subject being filmed or photographed may duplicate the color used as the backing.
can you use any color for a green screen?
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Answer: yes


Puja rituals are also held by Buddhists and Jains. In Hinduism, puja is done on a variety of occasions, frequency and settings. It may include daily puja done in the home, to occasional temple ceremonies and annual festivals. In other cases, puja is held to mark a few lifetime events such as birth of a baby or a wedding, or to begin a new venture. The two main areas where puja is performed are in the home and at temples to mark certain stages of life, events or some festivals such as Durga Puja and Lakshmi Puja. Puja is not mandatory in Hinduism. It may be a routine daily affair for some Hindus, periodic ritual for some, and rare for other Hindus. In some temples, various pujas may be performed daily at various times of the day; in other temples, it may be occasional.
is puja the most important part of hinduism?
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Answer: no


The FIFA World Cup qualification is the process that a national association football team goes through to qualify for the FIFA World Cup finals. The FIFA World Cup is the largest international team sport competition in the world with a qualification process required to reduce the large field of countries from 211 to just 32 for the World Cup finals.
does every team go to the world cup?
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Answer:
no