Friday, 13 May 2016

Green Screen Tutorial: Part One - Setting up a Green Screen

Today we had a very basic tutorial in how to set up a green screen using the classic lighting theory. This is created by using 3 point lighting, which consists of:

Edge Light: This acts as the sun and is the strongest light.
Key Light: This acts as the bounce back and isn't as strong as the edge light.
Fill Light: This is the light that is used to balance out the shadows and create the overall mood and tone you are trying to achieve.

When lighting your object, you want to try and achieve 3/4 back lighting or the Golden Hour as it is commonly known as, if you are wanting to achieve a natural looking light for your project. However, different lighting can create different moods and atmospheres for instance if you wanted to set up a night scene, it may work better if you were to only use the edge light to mimic the moon's light. This is why it is important to set up your lighting before you do anything else. The placement of the lights is also important, as this will help to create an even spread of light. The edge light is placed in one corner of your stage with the key light placed opposite to act as the light that would naturally bounce off of other objects. The key light can be replaced with a reflector, however it is better to have control over the intensity of the light. The fill light is then placed where it will help to balance out the shadows and the screen light is placed facing the screen where it won't effect the lighting of the subject. This light should be around 50% to help create an even colour on the screen.

Green screen setup


On top of this, it is important to remember to set the camera up at eye level unless you are looking up or down. It is also useful to try and fill the screen with as much blue/green around your object as possible, as this will make it easier in post-production to remove the backdrop.

Using a green screen is something that I've always known about but never had the knowledge to use it. But I am now confident that I ever have the need for a green screen, I will be able to successfully set one up appropriately to achieve what I want.

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