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it seems like Hollywood Blockbusters these days are always trying to outdo

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each other to see which film can have the most wildly over-the-top

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multi-million dollar special effects and while this sort of movie Magic can

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require some really complicated postprocessing much of it relies on a

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pretty simple piece of equipment The Humble green screen which allows it to

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appear as though a piece of content was filmed in a completely different

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location be it a Fantastical one or

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totally mundane one but how does it work

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well when you shoot something in front of a green screen such as your favorite

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YouTube host you can tell Whatever video

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editing software you're using to detect a range of colors in this case shades of

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green and replace anything that falls within that range with a transparent

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layer that means you can put anything you want behind it and it will peep

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through and although this is a pretty simple idea green screens have proved to

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be extremely versatile and are widely used to Overlay even extremely complex

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and expensive CGI in high budget films

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now part of the reason for this is how useful the color green is modern digital

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video cameras use things called Bayer filters to capture light these filters

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are designed to be more sensitive to Green Light than to red or blue because

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our own eyes operate the same way way and are most responsive to Green this

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allows the camera to record many shades of green very accurately so that when

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the raw footage is edited on a computer the software can precisely replace only

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green pixels and leave everything else intact green also contrasts very well

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with human skin color unless your name is Bruce Banner making it an ideal

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choice for use in a studio but green screens weren't always the most commonly

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used background for special effects before the Advent of modern digital

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recording blue screens no not that kind

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were actually more popular you see back in the era of the physical film real

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special film that was only sensitive to Blue Light was readily available making

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it easy to produce a negative that came out clear where the blue screen was

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which could then be overlaid with a background to produce a full scene blue

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screens were used extensively in Classic Movies such as the original Star Wars

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Trilogy Where producers filmed miniature models of Starships in front of blue

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backgrounds and they continue to be used today in certain situations such as

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shooting low light scenes so wait a minute lonus are you telling me that all

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I need to create awesome scenes at home is a camera an editing rig and a big

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green or a blue sheet well sort of

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before you whip out the camera and try to give James camera to run for his

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money there are a couple of things to keep in mind if you're shooting with the

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green screen although modern video editing software is very good at

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differentiating Shades of Green from other colors shadows and shiny surfaces

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can absorb or reflect enough green light to throw off your software and make the

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finished product look like a mess for this reason proper lighting is extremely

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important to professionals who make a living off of green screen recordings

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but are YouTubers like me going to be using green screens forever we are

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starting to see cameras that can actually record depth information kind

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of like the connect for Xbox so the future could be very interesting but for

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professional cinematographers instead of casual gamers this technology is very

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very far away from mature so for the foreseeable future you won't be

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expecting to see me wear any green shirts on St Patrick's Day so let's say

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you were watching this video and you're thinking to yourself wow gee that sounds

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really interesting I'd love to get into video creation boom linda.com with the

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linda.com membership you can watch and learn from Top experts who are

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passionate about teaching about all kinds of subjects we're talking

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actually watch offline on your Android or iOS phone you can take notes as you

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liked this video do that thing if you didn't then do the other thing don't

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