All language subtitles for 08. Exercising color matching

in this lesson

we will color match our CGV

effects element to our background plate

so the way we go about this is by using a simple

color correct node

now you can hit the tab key and type in color correct

or you could also hit just the C key on your keyboard

in the node graph view

and that'll bring it up as well

now the thing we're

we need to keep in mind is

we are going to be doing some adjustments

such as gamma adjustments

which will affect

how our pre multiplication is happening on this layer

so what we need to do is we need to add a premult uh

after and an unpremult before

so the the reason for this is

it will become a little more clear once we actually uh

make some adjustments

and I'll show you what happens with or without

uh the pre multiplication and un pre multiplication

so let's just add those nodes right there

and what I'm actually going to do

just to clean things up a little bit more

we're gonna drop these down below

just like that

and then we will adjust the location of our merge nodes

down just like that

line everything up

just just keep things tidy like I've

like I mentioned before

if you follow any of my lessons

I I I I'd like a clean palm tree

just makes things a little less stressful

when you're trying to find things

and troubleshoot

as well as just to

to view what your

what your your working with at the moment

alright so we have that unpremolt

and that premult going on right there

let's start color correcting

so if I adjust the gamma

what we're going to do is

we wanna milk it up just a little bit

so I'm gonna just bring that up just a smidge

maybe like that

and then I'm also gonna bring up the gain as well

and that's that's not looking too bad

so basically

the point is

we're wanting to adjust

if you switch in your color uh

your RGB pass uh

passes you can start to see that the blacks

will start to match a little more

what's in that background right there

if I turn this on and off

you can see

obviously uh

we're currently looking at the blue channel

so you can see where the blue channel starts to uh

blend in a little more

starts to seat and match more

what you're seeing in your actual background plate

as well as the green

you can see the green channel difference

OK we just brought it up

and also the

the point and then the red channel as well

the reason that I'm

I'm adjusting Gam as well

is because I want to milk it up

I wanna adjust the

over all black levels uh

so it's not just maintaining the black levels

and that's actually the reason

we're adding the unpremult

and premult

so what's gonna happen

if I turn off these two nodes

you will actually begin to get

a certain level of fringing and it's

it's hard to tell

uh but it is

it is there

in fact what we could do

just for kicks

let's turn off that gain

and let's just crank that gamma

I'm gonna turn these two off here

now you see

okay so if we go full screen

see how we are bringing the black holes up so much

that it is actually pre multiplying in uh

and adjusting the edge detail

that nice fall off detail

that's going on in the alpha channel

so by unpremulting it

and then it's color correcting

that RGB has

and then premultifying back on the

unedited uh

but alpha channel

you're then getting a more properly integrated image

now I think

at this point

we've obviously

got a little too far on that gamma

but you get the idea so let's

let's bring up that game

just a little bit here

and as I'm looking at this I

I think it's still too much

I'm basically what I'm

what I'm specifically looking at

is integration

between the buildings

and the background

right there

so I want to

I think I'm gonna bring up the game

just a little bit more

something like that

and then drop that down just a smidge

cause I'm trying to add a little more contrast

in the lighting as well

cause obviously that's a

it's a nice feature where the

where you see the fire coming through

now you're going just a little bit too far

when you start to see the black

the darks and the blue

right there is are

are going over what

is in the background plate

so let's back off just a little bit on that gain

and to match the milking up

we can just bring the gamma up just a smidge somewhere

let's just switch over to me

oh there we go like that

bring that down just a little bit six

I think that's

that's too much 1.4

somewhere in that realm

right about there

so if we turn this on and off

you can kind of see the difference between the two

jump between your color channels

you can see what's going on right there

uh okay so that's the area I'm looking at

now what we wanna do is

we're gonna want to do a secondary color

correct above

for where the

the main mushroom cloud is

that's also important

to try to get that integrated just a little bit better

as well so what I want to do for that

let's just close that

and we're gonna still work

in between the unpremult and the premult

so I wanna make a little space

let's just drop that down a little bit

and we're gonna add another color

correct here

clamp that in

and we're gonna add a roto shape

and the roto shape is going to help us to

control what we want to do now

if you wanted to not have to roto that roto shape to do

follow the timeline and animate it

you could again

do exactly what we did with these

where we could just copy that

can paste it

make sure oops

make sure you connect it properly

back up into where the camera is

and remove that lens distortion

note over right now um

we're gonna put that road up there

connect it in

move all this over

just lined up

now we obviously want to stay on frame 4:20 eight

and what I'm going to do is

I'm just going to draw a rectangular shape like this

and some right about

maybe right about there

and then we're gonna add some fall off

uh just first

I don't need

um I don't need these control

so what we're going to do is we're just gonna cusp

cusp it and then hit the e key

you can add

add feather

by repeatedly hitting the e key

after you selected points

you can also use it

if you're right click on the rotor nodes

but I just like to use shortcuts

and then once you've brought that out

you can just manually drop that down a little bit

I'm thinking something like that

go back up a little bit more

just to get

maintain a little more of a fall off

there we go

now what we're going to do is connect that into there

so it's basically

that's your animated alpha channel

and now you just didn't have to rotate the

you know 785 frames or so of uh

of roto that would have been required

now what we're gonna do is

we're gonna affect the top

so just for kicks

let's just crank that puppy and see what happens

so you can see

it just starts to dissipate into the clouds

we don't want that much

but I do want to bring it back a little bit

so it's basically

it's starting to kind of dissipate back into those

that kind of

cloud atmosphere area

add just a little bit more on there

swing it'll gain

if you wanted to add contrast

in this case

we don't want contrast

but you know

you can you can

you see what I'm pointing out

it's fun to be able to play around with these

and see where you can go with the

with the overall look

um at this point

I think that's not too bad

what I want to do though

is I'm looking at this

and I'm saying

you know what

overall I feel like maybe we need to add

just a little bit of a blue hue

so you can see what we've

we've just uh

kinda integrated the upper half

it feels like it seats just a little bit better

a little less uh

high contrast

and doesn't pop out of

the sky as much

it feels like it's kind of falling back into the sky

which is nice

but I do think we need to add some blue

a blue hue to that

so you could either color correct in here

but we're already adjusting the gain overall

so I would recommend

what you do

is just add one more color correct in there

and that one can be your color

actual color control

so you split out the channels there

and what we're gonna do is

just add a little more blue in there I think

so let's just uh

bump that up

just a little bit

right there

now you can see it's definitely turning blue

we don't like that

that's too blue ha ha

so let's draw it back to what it was

and then we're just gonna add

just a smidge

this is basically just kissing in little bit

to try to start to integrate

the overall feeling

of the shot

um you could

try to back off just a little bit

on the Reds

um that's making it just a little bit too bluish

you can kind of run

if you run your mouse over

kind of like

pick maybe something like

right about there

you can kind of see it's

the values are

point seven six

point seven six

and point seven

seven on the blue

so you can see that

we are ramping that up a little bit

but over here if you uh

check in the sky

it's a little less

red and green

and blue stays about the same

so let's uh

let's drop that down to

point nine eight

let's leave that at a 1

let's leave that at a 1

now what you're doing is

you're kind of

starting to color correct

based upon actual value

not just eyeballing it

and that is getting a little bit

closer to what

I'd like to see it

matching to

now if we turn that on and off

you can see that

we're just kissing in

just a little bit

of the atmosphere coloring

that is happening

overall in that

in the shot

I think at that point

I think we're good

so at this point

I think we'll take a quick break

uh to recap

uh we've just been discussing

color matching our uh

CGV effects element

to the background plate

and we come back

we will begin

adding just a little bit of lighting

on our actual background plate

to match it

a little more

and to begin

and continue

to seat our

visual effect

a little more

into our background plate