it seems like Hollywood Blockbusters these days are always trying to outdo
each other to see which film can have the most wildly over-the-top
multi-million dollar special effects and while this sort of movie Magic can
require some really complicated postprocessing much of it relies on a
pretty simple piece of equipment The Humble green screen which allows it to
appear as though a piece of content was filmed in a completely different
location be it a Fantastical one or
totally mundane one but how does it work
well when you shoot something in front of a green screen such as your favorite
YouTube host you can tell Whatever video
editing software you're using to detect a range of colors in this case shades of
green and replace anything that falls within that range with a transparent
layer that means you can put anything you want behind it and it will peep
through and although this is a pretty simple idea green screens have proved to
be extremely versatile and are widely used to Overlay even extremely complex
and expensive CGI in high budget films
now part of the reason for this is how useful the color green is modern digital
video cameras use things called Bayer filters to capture light these filters
are designed to be more sensitive to Green Light than to red or blue because
our own eyes operate the same way way and are most responsive to Green this
allows the camera to record many shades of green very accurately so that when
the raw footage is edited on a computer the software can precisely replace only
green pixels and leave everything else intact green also contrasts very well
with human skin color unless your name is Bruce Banner making it an ideal
choice for use in a studio but green screens weren't always the most commonly
used background for special effects before the Advent of modern digital
recording blue screens no not that kind
were actually more popular you see back in the era of the physical film real
special film that was only sensitive to Blue Light was readily available making
it easy to produce a negative that came out clear where the blue screen was
which could then be overlaid with a background to produce a full scene blue
screens were used extensively in Classic Movies such as the original Star Wars
Trilogy Where producers filmed miniature models of Starships in front of blue
backgrounds and they continue to be used today in certain situations such as
shooting low light scenes so wait a minute lonus are you telling me that all
I need to create awesome scenes at home is a camera an editing rig and a big
green or a blue sheet well sort of
before you whip out the camera and try to give James camera to run for his
money there are a couple of things to keep in mind if you're shooting with the
green screen although modern video editing software is very good at
differentiating Shades of Green from other colors shadows and shiny surfaces
can absorb or reflect enough green light to throw off your software and make the
finished product look like a mess for this reason proper lighting is extremely
important to professionals who make a living off of green screen recordings
but are YouTubers like me going to be using green screens forever we are
starting to see cameras that can actually record depth information kind
of like the connect for Xbox so the future could be very interesting but for
professional cinematographers instead of casual gamers this technology is very
very far away from mature so for the foreseeable future you won't be
expecting to see me wear any green shirts on St Patrick's Day so let's say
you were watching this video and you're thinking to yourself wow gee that sounds
really interesting I'd love to get into video creation boom linda.com with the
linda.com membership you can watch and learn from Top experts who are
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