Course info
Jan 23, 2017
3h 30m

Learning the fundamentals behind pulling a Green screen key is very important, but it can be hard to know where to start. This course, NUKE Green Screen Keying Fundamentals, will teach you how to complete a simple green screen shot and then composite it over a new background. First, you'll discover how to analyze each unique shot and which background colors work best to film on and why. Next, you'll work through each one of the major keyers inside of NUKE, learning how to refine each tool and what their strengths and weaknesses are for different types of green screens. Finally, you'll pre-process the green screen footage to create the most optimized key possible and composite it over top of a newly integrated background. When you're finished with this course, you'll not only have a completed green screen composite, but you'll also have the knowledge and skills needed to key any basic green screen image in the future. Software required: NUKE.

About the author
About the author

Melissa brings 15 years of industry experience to Pluralsight. Born and raised in Winnipeg, Canada, she first became interested in multimedia in high school.

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Section Introduction Transcripts
Section Introduction Transcripts

Course Overview
Hi, everyone, my name is Melissa Best, and welcome to my source NUKE Green Screen Keying Fundamentals. I am a senior visual effects instructor at Vancouver Film School with other 15 years of production experience as a compositor. My most recent production role was a compositing supervisor for feature film. This course is an introduction to green screen keying in NUKE. Basic working knowledge of NUKE is suggested. Some of the major topics that we will cover include using different back shots for keying purposes, lighting for green screen filming, fundamental keying definitions and terms, a step-by-step guide of how to use the major keyers in NUKE, pre-processing the green screen footage for optimal keying, and completing a basic key through to the completed composite. By the end of this course you'll know the core fundamentals of green screen keying and compositing inside of NUKE. I hope that you'll join me on this journey to learn green screen keying with the NUKE Green Screen Keying Fundamentals course at Pluralsight.

Introduction to Keyers
In this module we're going to review an Introduction to Keyers. The first thing that we're going to take a look at is how to analyze the greenscreen and this is going to allow us to determine any areas of interest that we may want pay attention to. So some examples of that are unevenly light greenscreens and anything like motion blur, transparency or fine detail. Next, we're going to review the three most popular keyers in Nuke and those are the Primatte, the IBK and the Kelight keyers. We're going to discover the strengths and weaknesses of each one of those tools and look at the settings and the sliders that we can use to get the most out of those basic keys. So let's get started and I'll see you in our next clip.

Image Optimization and Pre-processing
In this module, we are going to take a look at image optimization and preprocessing. So the first thing that we will take a look at is what is noise and how do we rid of it? So where does it come from and how can we rid of it while still retaining nice detail in our images? Next, we will take a look at white balancing. So again, what is white balancing and what is it needed for? Next, we're going to take a look at operator functions in Nuke. So are really important. It allows us to combine two or more images together in different ways. So they can be used to combine alpha channels together or to really make the best of our RGB channels inside of Nuke. Last, we're going to take a look at refining uneven green screens. So after we denoise the plate, maybe we white balance and use some operators, we're going to use those functions together, but also find other ways so that we can even out those green screens that have maybe wrinkles in the fabric or uneven lighting. So now that we have a brief overview of this particular module, let's into our first clip.

Completing a Green Screen Shot
In this module we are going to look at completing a green screen shot from start to finish. First we're going to pre-process the plate. So pre-processing includes evening out the green screen, denoising the plate and perhaps doing some white balancing or color casting correction. Next we're going to pull a key. So pulling a key is going to include a Keylight tool to make sure that we have that really nice alpha. Next we're going to refine the edges and the alpha, so making sure that Alpha is opaque where it needs to be opaque and transparent where it needs to be transparent. And lastly we're going to final the composite. So that means including some light wrap, re-introducing some of the noise and any additional steps that will really help us to integrate that foreground image with our new background plate. So now that we have a really great overview of this particular module, I look forward to seeing you in our next clip.