All language subtitles for Nuke 102- CLASS 6- Advanced Keyer_ Core Despill and Edge Despill

okay so we're gonna talk about why we use an Edge d

spill and a core d

spill as opposed to just having 1D spill altogether

and why that's necessary well

one of the reasons being is the core d

spill will deal with maintaining

the skin tones

which we do not wanna touch um

depending on our liberties as a compositor

whether we color correct or not

um definitely you know

we can maybe play around

but we basically before we hit color correction

we want to make sure that the colors

skin tones are kind of left alone

and then the edge de spill has to do with the edges

so we'll be using a key mix between

using as a mask

our format to

mix these two together um

and actually have best of both worlds

maintain the

the center mass of our skin tones looking good

and then our edges

we have a little bit of play

to help it melt into the background image

which in this case

I made it a little bit

lighter in this case

so like a like a light tan color here

so to give us less headache

so let's go ahead and take a look at this

I'm gonna put my viewer to this edge de spill

I just wanna show you what that looks like

so go ahead and jump over here

now the Edge d spill

in this case

using as I showed you before

the key mix between these two key lights

is basically in a circumstance

trying to match the color

and the luminance value of the hair

and over here

just trying to get this to match

um to the actual

tan background here

so as you can see

I've done a little bit of work into

each different key light

and then using this mask to color correct each one

so I get this nice

thing that will blend very easily into my background

image without using Edge Extend

which we're gonna get into later um

whereas the Core d spill

you can see

it's a lot brighter

but it has these super bright edges

so this obviously won't work um

if you can see

I have a currently plugged in as just being our

single d spill

if we take a look at

in the final output here

you can see we have a Halo of white around

the character right

now the core colors look good

and this is the difference between the Edge d

spill and the Core d spill

if I take a look at the Edge d

spill versus the Core d spill

you can see that the edge d spill

is fiddling with those

little highlights here right

it's causing problems

whereas the core d spill

maintains the luminance information

by the reintroduction and reapplication of the lost

d spill luminance information of the green

hence it's what we want

it's basically what we have in our original image

so the edge

we're gonna basically use the edge mat for the edge

and the core for the core

so how do we do that

well the core mat right

if we take a look at our core mat

versus our regular mat

you can see here's our edge mat

or our full full mat

and here's our core mat

which is shrunk in a little bit right

so we are gonna basically have

uh this area

and the center be a mask

right the core

to the the core itself of the d spill

so how do we do that

well we're gonna go ahead and use a key mix here

key mixes are used a lot in this industry

and we always put the a input to the actual core

because that's what we're gonna kind of put on top

so to speak

and then B goes over to the actual edge d spill

and then the mask will be hit 0 for roto

put a roto mask in there oops

wait I'm sorry

falling asleep here

the mask input is gonna be plugged into

the core with an exponential blur

now an exponential blur was created by

Mr Tony Leon Lions

Lion if I'm hopefully I'm not tearing that apart

um and what the

exponential blur does

is it's basically a blur that goes outward and inwards

you can see it kind of you can punch it out

and then you have your multiplier here

to kind of change up the gradient

so you can pop out and you can pop in

so it's a feather that goes both ways

both out and in

so in this case

we probably wanna bring this in a little bit

so you can see the difference

like that and again

depending on how much blur you want

and go ahead and play with that a little bit

so let's see what this looks like now

so now we have the mix

the mixing of both of these images

let's go back to our RGBA

and we're getting the best of both worlds

so if you take a look

I'll disable enable

core is holding out

the actual core de spill

so we're not losing any luminance information here

under the goggles

these highlights are not going to puke

as we talked about before

where it looks like it's

the color corrections been broke

and the edges are actually as you can see here brown

right so when you take that and you

put that as your final output right

let's take a look at what we get

so again a beautiful result

again it's not perfect

we have issues here in the hair

do the fact that you know

the color grading via the key light didn't get in there

but I can tell you it is a world of difference

world difference than what we had before

again we have not included edge blur

color correction light

wrap edge extend all that stuff

which can kind of help with a little bit edge extend

we talk about later should be used ever so slightly

and just just a little bit extra to help kind of

take the edge and extend it into the alphabet

based on the sampling of the color

pixels that are in the localized areas again

we're gonna get into all that a little bit later

but in general

this you can use as a basic template again

this will be class 6 finish

and allow you to kind of get a basic idea of why we use

Edge d spill core d spill a core in fringe mat again

we haven't got into the Uber keyer yet

which involves the actual

d spill edge fix

but again once we get in that

you'll see how we'll be able to take an image

like a sunset and have a per region area

kind of blend the background image into

the areas that were considered d spill

so there's a lot to learn

and we're gonna move on to our next lesson

with that said