What Is Green Screen And How Does It Work?

what is green screen and how does it work.

What Is Green Screen And How Does It Work?

What is Green Screen

Green screen plays an important role in videography. Learn what a green screen is and how it works.

It is not always possible to shoot videos and images in attractive locations with unique backgrounds. They can be remote or inaccessible. Or worse, nothing, like fantasy or science fiction.

Also Read: 10 Ways to Improve Low Resolution Video Quality

But, that doesn't mean making videos with amazing backgrounds are exclusive to big-budget studios. Thanks to the green screen, everyone can be anywhere at any time in their video. So, what is a green screen?


1. What is a Green Screen?

2. Why Should It Be Green?

3. How Do Green Screens Work?

4. Green Screen Vs Blue Screen

5. Conclusion

What is Green Screen?

In the field of photography and videography, a green screen is a bright green canvas background that allows photo and video editors to change their entire background in post-production. The goal is to make the transition from the shooting location to the edited background as smooth and natural as possible.

Green screens are usually made of stretchable synthetic nylon spandex, but any bright green fabric can be used as a green screen, though with varying results.

In fact, some people paint their walls bright green to imitate a green screen. Basically, the green screen acts as a background substitute. This is the biggest indication that whatever is captured will have a completely different background.

Why Must Be Green?

The choice of green may seem a little confusing at first, but the answer is very easy. People, and most clothing, furniture, and decorations, are not green. While green is a color that stands out in nature, it is rarely used in fashion or everyday d├ęcor, be it a home, office, or coffee shop.

Other colors, such as brown, yellow, orange, and red can be found in a variety of colors around and even as tones on people's skin and hair. While it's possible, when it's time to replace the screen with a background, those colors make the job ten times more difficult.

How Do Green Screens Work?

Conceptually, green screens rely on simple techniques. However, in practice, small details and changes in light exposure can cause significant changes to the resulting image quality.

When preparing a green screen, it is important that the entire surface is uniform. It requires even, strong lighting and the canvas material should be as straight as possible with little or no wrinkle that creates a troublesome contrast.

You also have to be careful that the actor or model doesn't cast a shadow on the green screen by using overhead lighting.

Green Screen Vs Blue Screen

Blue is another color that is not often used in artificial objects and people. Not to mention, blue is the rarest color in nature, as very few animals or plants are blue.

A variety of “green” screen colors were used in the early to mid-20th century in black-and-white films and dramas, but these colors became popular after the advent of digital cameras. Digital cameras tend to capture twice as much green as all other colors, including blue. That means, it's easier to select and replace the green background in post-production than any other color.

Not only that, the green screen only needs less light to be bright, which means you need less lighting on a shooting set. Perfect for photographers and studios working on a budget.

But one of the biggest downsides of a green screen is its brightness. There is a lot of color spill over to other parts of the set. So whoever or whatever you shoot will reflect the green light. That's especially a problem when shooting shiny or reflective objects.

Blue screens are much easier to use when shooting dark scenes, where there shouldn't be a lot of light. Plus, they're easier to put things that melt onto the green screen, like blonde hair. However, blue screens are more expensive to use because they require more light to work properly.


Green screens have been used in films since the 1940s and still survive today. The bright green canvas is still the same. It is a photographic and key technology that evolves with every new digital camera and video editing software.

Some film studios with high budgets are abandoning green and blue screens in favor of curved LED screens. However, green screens are unlikely to disappear anytime soon as they are cheap to implement and easy to use with the help of modern keying software.

Hopefully, this article about What Is Green Screen And How Does It Work?, gives you a little insight. Also, read an article about What is HSTS and how to activate it that you may need to know. Thank you.

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