All language subtitles for 06. Basic 3D scene creation in NUKE

in this lesson

we will learn how to build our basic

node based 3D scene within nuke

in our last lesson

we discussed how to utilize the camera tracker

which then subsequently

was able to create for us a 3D camera

with our point cloud data

as well as various other no uh

3D scene nodes

now what we're going to be doing now

is we're going to be shifting this around a little bit

to set it up

in the way that we need for us to be able to do

an actual image projection setup

so I'm going to full screen our node graph here

and I'm just gonna start moving a few things around

so what we have to do is we need to take into account

the fact that we want to image project

specifically

to get more specific

not just these four layers

but more specifically

we want to image project our building

and our antenna layers

that we exported out of Photoshop

so what we need to do is to build this

so that these inputs will

or outputs I should say

will then input into a 3D scene

where we will have 3D cards

and then will

that will output into

through the scanline render

and we will be then comping that

back on top of our mountain footage

utilizing our 3D camera tracked data

now how do we go about doing that

well there are a few nodes that we need to

utilize now we can

we can either hit the tab key and start typing in nodes

but in this case

I just want to familiarize you just a little bit

with the 3D nodes that we have available

so if you go over to the node

drop down menus

on the left here

you'll see under the

under the 3D tab

it's basically a little 3 3D cube

you'll be able to see various nodes

that you can utilize

some of these

if you are familiar with 3D packages

some of the stuff might actually sort of make sense

in this case

there's specific few

few specific nodes that we will be utilizing

so you can actually

the cool thing about

in my Nukes 3D scene is you can

you can use lights

you can actually create some

some faux lights onto some scene

to create additional lighting scenarios

your your geometry

obviously you have basic geometric shapes like cards

cubes cylinders

that kind of thing

you have spheres

and then a few other

geometric based nodes um

those allow you to be able to

create basic geometric shapes

which then you can project imagery onto

and that's actually

kind of what we're going to be doing

we're gonna actually

probably utilizing a card

potentially a cylinder

I haven't decided yet but

but definitely some cards

we're also gonna be utilizing a few other nodes

we're gonna be utilizing the Project 3 d node

which allows you to be able

to project actual 3 d uh

imagery onto the 3D cards

or the 3D various uh

geometric shapes

so if you go on to shader here

you'll see that you have Project 3D

so actually

that is the node that we want to create first

so I'm just gonna select that

now you have two inputs

you have the cam input

which is your camera input

and then you have your

your basic input

which is your color pass input

so in this case

the color information

it's going to be inputted

will be our building shapes

so now what I'm going to do for this

I'm actually gonna turn off those two merges

so basically

we have just our building

with our antenna

I don't wanna deal with any of these color

correction layers

that we're going to be building uh

later once we've actually created the 3D space

so what we're gonna do here is we

we have the Project 3

we have the input

now what we need to do is

we need a camera input

now there are two cameras

that we're going to be

utilizing in our setup

one camera is our

projection camera

which will be that input

for the Project 3D camera

this will make more sense

in just a moment

once we build

I'm gonna build the nodes

and then it'll be

make a lot more visual sense

once we can see what's happening

but that's a separate

different camera

from our 3D camera

tract camera

now the reason for that

the K3D camera

is replicating

the entire movement

of our background plate scene

the thing is

if we utilize that camera

as it's moving

what it's going to do is

you can almost think of it like a

like an old fashioned

slide projector

if you were projecting a slide on the wall

and then you took that old fashioned slide projector

and you moved it

you picked it up

and you physically moved it

through the room

while it's projecting on the wall

you would see that

that slide that it's currently projecting

would be moving

through the room

so it wouldn't

it wouldn't stay fixed

to any one location within the room

now that's exact same thing

that would happen

if we connected

our current camera

tracked camera

to that camera input

for Project 3D

because then

it would start to project

this information

the antenna input

and the building input

onto a 3D card

which would then

finally render out

and would actually

move through the scene

as the camera is panning

so that's that's

not what you're wanting to do

what you're wanting to do is

you're wanting to project it

onto a specific location

and then once you have that specific location locked

in terms of this

then your final

camera output

which will be the

this live at the

the camera that has

the camera match

move information

will then be

what will be rendering out

so that way

when the 3D geometry

moves through the scene

or is stationary the scene

the camera moves through the scene

it will actually

properly be viewed

and move and match

with the original

camera background

camera footage

this will make more sense

in just a moment

I know that that

that's very vague

when I'm just

verbally describing it

so let me set up our C R R

3D scene nodes

and then we'll be able to

visually see

exactly what's happening

so what I'm going to do is

I'm going to copy

this camera note

I'm going to paste it

now you can see

it is linked

now the reason

I'm copying this

I'm actually going to

utilize this

in a way because

if you remember

we were discussing

the fact that

we utilized

for the Map Painter

he used Frame 100

of our image sequence

to be able to reference

to be able to create

that mapping

so in this camera too

what I'm going to do

I'm gonna rename this to

projection camera

that way we

we know exactly which one

and what that is

and what I'm going to do is

we're going to

go to frame 100

so we're now

at frame 100

and now you can

you can see in here

if actually

if I scroll through

you see how

there's camera data

moving in the

translate and

rotate inputs

what we're gonna do

is frame 100

I'm actually going to

delete that animation

but I'm gonna stay

at frame 100

so we will remember

the information

that's on that frame

so I'm just gonna click

no animation

it's gonna ask

if I wanna delete this animation

yes I will say

yes in fact

let's see here

yep that's exactly what I wanna do

so no animation

hit yes then

I'm gonna do that

for all six inputs

now you can see

how basically

the blue background

that indicates

that there is animated

keyframes in there

disappears but

you still have

the values that

are based on frame 100

that's exactly what we want

so let's just

delete these inputs

and now we have it

all broken so

this is exactly what we want

so now what we're going to do

and then also

we need to go into projection

the focal length

horizontal all these

that are linked

basically we need to break those

as well now

this shouldn't

be an issue

because none of this

should be moving

but we're going to

ensure that nothing is

shifting through that

this the sequence of frames

0 through 1 80

so just delete these

no animation

it's a little

bit of a tedious moment

but let's get that

there we go

and now what you see

you actually can see

that green line

that was connected

to the camera

now indicates

that there is nothing

connected back

and linked back

to the camera

tracker note

that's perfect

that's exactly

what we wanted

so we connect

that camera now

and now we have a

projection camera

now the point of this is

now if I drag

drag through

the timeline

you see how

that camera

is not moving

versus if I

select this camera

which is our

original match

move camera

did you see

how that's moving

but our projection camera

it stays the same

at frame 100

but it is different

it just doesn't move

in comparison

the camera that's moving

so that's exactly

what we want okay

let's keep moving on

this will all make sense

once we have

everything set up

alright so we have that

now what we're going to do is

we're going to

add a card so

you can either

go into the 3 set

and you can

go to geometry

and can add a card

or you can hit

the tab key

and type in card

either one works

connects your

image input

to Project 3D

now you have a card

so the whole

point of the card

if we go back

into 3D space

you can actually

see there's a

there's a 3D plane

right there

that would be projecting

that camera

information

onto it now

now we're not gonna adjust it

we're not gonna

move it right now

I just wanna

keep on setting

everything up

then it will make sense

so now the next thing

that we're going to

set up is our

scene so we

hit that scene

no right there

I'm gonna copy it

I'm gonna bring it over

or you can again

you can pull it

from the 3D

section right here

you see seen

right here at

the bottom or

you can hit

the tab key

and type in

seen as well

there's more

than one way

to skin a cat

now we have that

seen note now

the next step is

we need to scan

line render

so we're gonna

bring that in

and now we will

connect let's see

we have our camera

we have our BG

and we're gonna

connect our

object scene into that

and then now

this camera

the match move camera

is going to

connect to that

scanline render

camera just like

you can see

over here as a

per example

the camera inputs

into the camera

input the camera

is inputting

into the camera input

of the scanline

render alright

so we've connected

that in fact

what I'm gonna do

I'm just gonna copy it

because now

we'll set that

that way okay

now I'm going to

name that camera

match move camera

okay so now

we know that

that's the match

move camera

that came out

of our camera

tract data so

the next step

now literally

basically at this point

we're actually

we already have

our 3D scene set up

so I'm just gonna

take all this

I'm gonna move it over

and I'm gonna copy

the footage

and move that over

so basically I wanna

I wanna take

all of this

information

that these nodes

basically are useless

at this point

we really don't

have a use for

any of that

at the moment

but I'm gonna

keep that anyway

because it's

always good

to reference back

plus you don't

wanna if if

for some reason

you're like

hey I'm gonna

delete all these

these 3D nodes

you could but

don't delete

your camera tracker

no because that

is linked to

your camera

so I'll be as

you can see

right there

okay so let's

take a quick break

and in a moment

we'll come right back

and we'll continue

discussing how

we're setting up

our 3D scene

to recap in

this lesson

we have discussed

and Learned

how to build our basic

node based 3

3 scene here

with a nuke

and in the next

next lesson

we will continue

discussing what

everything does

to make sense

in terms of what we're

trying to do

to accomplish

our final image projection