All language subtitles for 2月23日 (6)

in this tutorial will show you how to set up an

emissive property to your material

where you can have certain parts of the mesh glow

and the metal light

so that part will not be affected

by whatever lights you have inside the scene

so this could be used for

a phone screen or for example in this

tutorial I'll show you how to do this for a

TV screen so here I have a basic scene setup

so we can use it as an example

I have a couple of televisions

that I will use them as a property on

for the TV screen

and then I have another plane

that I'll show you how to do this with a

custom texture

I am using a dome light

to have some sort of overall lighting inside the scene

and it's used in an HDR image of night time

so let me show you what that looks like

it's going to be very dark

and it looks like this

so this is the perfect candidate for some

Ms of property for some of the

faces on these objects

so first thing we need to do is let's set up a material

now open up hypershade

and let's create a redshift material

and I'm going to change brdf to GGX

just like I've been doing in all the previous tutorials

and for not type I'm going to set this to metalness

to use the metalness workflow

so the property that controls a missive

is going to be found under overall tab

and it's right here

emission and emission weight

these two

are the ones that you want to control and work with

so let me go ahead and make sure

we're going to use Atriot Editor to adjust these

but first we need to apply

the material onto the surfaces that we want to

be emissive so I'm going to apply this to

both of these TVs to the screen

so in here I just want to show you

if you have an entire object combined as one mesh

you can sort the faces

that you want to apply the material onto

so in this case the Stevie screen

right click and assign the existing material

and I'm going to assign the material

that we just created

right now is just a standard red shift material

and I want to do the same thing

but in this one I have the screen as a separate mesh

so it will work either way

I just wanted to show you a different

way of doing it

onto the faces of a single mesh

or onto the separated mesh

when I right click and its off screen

actually let me go back to object mode

right click go to assign existing material

and assign our material

so right now if I go ahead and render

nothing will happen

let me go ahead and enable IPR

and let me select screen

and then open up the Attribute editor

so that way I can

control the properties for this material

through the Attribute editor

and I Hyper Shade

going to switch over to RS Material tab

and go into the overall tab

so the property

that we want to control again is emission

and emission weight

so as soon as you change emission from black

to any other color whether use the slider

or left click and select a color

the parts that you have

that emissive material assigned onto

should begin to emit light and be emissive

now in this case it's not happening because

we need to control emission weight

so you adjust the color

and then you increase emission weight

so if you change this to anything other than zero

so if I go up to 1

the TV screens will begin to emit light

so if I go higher

it will be more intense

and if I change the emission color

this will also change

toward that color of the material is

and I can even choose a different color

doesn't have to be grayscale

so that's it that's all you really need to do

if you are just using a solid color

you change it and then increase dimission weight

now if I turn this down to 0 or to all the way to black

nothing will happen

so you need to change the mission color to

anything other than black

enable update

and then you of course need to increase emission weight

and you can go high you can go up to five

even more maybe 10 for more intensity

now you don't have to use a solid color

you can assign a texture to the emission property

right here so let's do that now

first thing I want to point out is that

I do have the TV screen UV

so if I go ahead and open up the UV editor to show you

so this is what it looks like

so if you can apply a texture of course you need to UV

your surface

so if I go ahead and

go to the emission property click on the checkerbox

go to file and then go to image name

click on the folder

and let's assign a texture to emit light

and the texture I'm going to use is going to look like

this just simple color bars

so that's the one I am navigating to

when you click on the folder icon

it

takes you to the Source Images folder of your project

and I'm just going to off screen select that image

and as soon as you do that it will begin to render out

so now we're using an image instead of a solid color

so if I go back down to overall emission weight

I can increase emission weight

you can see that emission property is no longer

controllable through a color because we have a texture

but you can still

control the emission weight

and make it more bright or less

so that's it that's all you need to do for an object

that needs to have and the massive property to it

and the massive texture

now the other example I want to show you is going to be

it's going to have to do with this plane

so let's say that you want to control

which parts are going to be

emissive and which parts are not

so on this plane

let me show you let me close this off

so in this plane I want to have

all these squares around

to not emit any light

and I want to have this face right here

to have a missive

so how would we do that with the same material

well to do that we need to have a mask

a texture that will define

which parts are going to be

a missive and which parts are not

so let me show you what the UV look like

go to UV editor and here's what I have

that's single middle face

that's the one I want to have a misa property to it

and everything else will not

so for this purpose I'm going to go ahead and

save the UV snapshot

so I can have this UV layout in Photoshop

so I know where to block out

which parts are going to be a mess up and which

are not going to be a mess up

so let me go ahead and save this UV snapshot

I'm going to go ahead browse

and I'm just going to navigate into the folded

directory where I want to save this

UV layout into

I'm simply going to go and give it a file name

in this case it's going to be UV layout

emissive you can name this anything you want of course

save

going to define the size on X on the width and height

image format JPAG is fine and just hit apply and close

it looks like it's not saving

so let me go back to object mode

and let me try again

and let's go into Photoshop

in Photoshop I'm gonna go ahead open up the UV layout

here's what it looks like

so that way I know where to put that

image and how to rock this out

so anything in black

for

emissive texture is going to be a non emissive surface

and anything other than black

either it's an image or a color

will begin to emit light

so if I create

a new layer let me turn the background layer

the uval layout into an editable layer

I'm going to move it to the top

and I'm going to turn this uval layout into

screen mode

so this way I can work on the textures below it

we can rename it now

use the layout

and for this one I'm going to fill it with black

so I'm gonna hit d to get my foreground to black color

and then I'm gonna choose the layer 1

hit alt pack space to fill it with the foreground

and then so everything is going to be non emissive

except for this middle square

so for that I can do a color or I can do an image

so in my case I'm just gonna go ahead and bring that

there are those color bars back in here

that's what I'm going to use when the dragon in here

the image looks large

so I'm going to hit Ctrl t

and just scale this layer down

and just position it right where it needs to go

and then I'm just going to save this as a PNG

as a texture

so again to reiterate

anything in black will be not emissive

and all the other colors will begin to emit light

and you'll see this in just a second

so I'm going to go ahead and save this as my PNG

let's export and I'm just going to save this as

a missive test

and I'm just placing it on

off screen into the source images folder on my project

so here's what the texture looks like

so let's go into back to Maya

and I'm going to go ahead and create

a whole new material

again

just so you get to see me create one and apply that

color that texture

I'm going to go to Hyper Shade

let's create a new material

first I'm going to clear this

and then red shift red shift material

I'm going to change BRD F again to GGX to a better

newer reflection model from the L type to metalness

let's go ahead and apply

this material

this can be RS material 2

I didn't name it but just remember the name of it

because we only created 2

so now it's applied onto the plane

let's select the plane

when I go into the attribute editor

click over to the tab for my material

and go to overall tab

and let me bring up the renderview

so here's what it looks like

nothing is on it other than

the default gray wretch of material

so now if I go to emission and assign my new texture

and go to file

let's go to a folder

and off screen it jumps into the source images folder

so I'm just going to select that emissive test texture

assign it nothing's going to happen

let's enable IPR

again nothing is changing

that is because we need to go back up the stack

back

into overall property and increase the emission weight

so this is going to hit 1

everything else will stay the same

except for whatever the color texture

that we have other than black will show up

so if I go higher

it will be more intense

if I go lower it will not be as intense

so that's how you apply emissive texture

onto an object that has

both emissive and non emissive surface properties

within the same mesh