All language subtitles for 2月23日 (5)

in this tutorial I'm going to show you how

to use displacement textures in Maya with redshift

displacements in Maya uses a texture

either a grayscale height map or a vector image

and then hooked up through a material

it will displace or modify your object

geometry based on those values within the texture

and you can use displacements to very quickly create

detailed geometry

without having to actually model it or sculpt it

so here is how to quickly

set up your material in redshift and begin to render

using displacements

here is an example of a height map displacement

what it looks like

a grayscale texture

that will use black

and white values and ranges in between

to displace your geometry

and here's another one

so just to give you an idea of what they look like

and I got these textures from textures

com so just to give credit where I got them

so we're going to use this one as an example

to begin to display our geometry

and I also have an albedo and a roughness along with it

so I'll hook them up later to complete the material

so what I have here is a simple scene setup

just so you know what I'm using

I have a Dom light

a wretch of Dom light

with an HDR image assigned to it for lighting

if you want more on how I set this up

and how to use one

I have a tutorial

on how to set up HDRI base lighting

and then I have a simple plane

and the only thing

I did to it is I've changed the size

width and height

to 500 units

and I've left subdivision width and height to 10

which is the default

so I've just made this plane larger

and this is going to matter

when we begin to adjust some properties

for displacements

so right now I have nothing else inside the scene

and I have a limbered material applied out to it

so if I go ahead and do a quick render

let me bring it over here and do a quick render

here's what it looks like

so let's go ahead and set up our redshift material

going to go open up half a shade

and we're going to

create a whole new redshift material

go to redshift

redshift material

and let's go ahead and name it really quick

so I know what to apply

redshift RS and displacement

and of course you can name this anything you want

so again the first things I go

through when I set up a redshift material

for metalness workflow

is I change BRDF to GGX

and frontal type to metalness

alright and the first thing for displacement textures

and the only thing you need

is a redshift displacement node

you don't even need to adjust or input any other map

we can just simply start off with that texture

with the displacement texture

so if you take a look at this material

the material shader group

this is where we would plug in our

displacement node right here

into the displacement shader

so there's only one difference that

if you've watched all the tutorials in the series

we had to

use all the textures and plug them in right here

and our displacement node will now go into here

so let's go ahead and insert that node

in this Graph Editor

hit tab and search for displacement

and the one you need is this redshift displacement node

go ahead insert it

and take the output

left click hold and drag

and connect it into this placement shader input

and our node is now connected

if you select this node

we have a property for a texture map to assign

so let's go ahead and assign it now

I already have those

textures inside the Source Images folder on my project

so I'm going to click on this checkerbox

go to file and then under image name

let's go ahead and click on this folder icon

and off screen it's already

put me in the source images folder

I'm just going to sign one of the textures that I have

and it's going to be that height map that I showed you

it's going to be this one right here

everything else will stay default

we don't need to change anything here

let's go back into the RS displacement node

and again

here we're also not going to change anything

other than I'm going to point out a few things

you have map encoding

there are two types of displacement textures

you can use height field

which is the one that we are using

the height map the grayscale

and there's also a vector one

now I haven't used this one before

but I've used the height field one

that's the one I'm gonna stick with

and that's the most common one they usually find

or use so now let's go ahead and

apply this material onto that flat plane

select it

right click hold and let's assign existing material

displacement and let's go ahead and do a render

I'm going to go ahead and enable IPR

and nothing is happening

the material is on there but

it's not displacing the geometry

so what you need to do is

enable a few properties

on the object level for

that plane or for the

object or for the mesh that you are using

to tessellate

and then to displace

so if you select your object

and you go to Attribute Editor

and you go to tessellation tab

and it's actually going to be found right here

under redshift

open that up and then you have two properties two more

tabs to open up tessellation

and displacement

so again this is going to be on an object level for

your mesh inatribute editor

into inside the ratchet tab

and you need to enable tessellation

this will desolate and add

additional geometry onto your object at rendertime

so this would adds the extra g 0

and then the displacement

go ahead enable this as well

and that is the texture that we are using in order to

displace the geometry

and these two work together

so we have to enable them both

one enables the texture use of the height map

and the other one begins to tessellate your

geometry at run the time

and you can see already is beginning to come through

now I'm just going to

quickly rotate this so we can see it better

so I'm going to go ahead E Alt J

rotate snap

so this way the textures just point in the right

direction

just so we can see it better

so it's not as strong as we want it

but it is coming through

so the first property that you need to adjust

in order for it to begin to displace a lot further

is under displacement and is going to be

maximum displacement

and displacement scale

now

usually you don't need to adjust these values as much

if you're using very small size objects

but because I've sized my plane

very high to 500 units

I'm gonna need to increase these values

and I'll show you what it would look like on an actual

plane first so let me actually do that now

if I create a simple plan and I don't size it up

and let me just get it framed in

so here's what it looks like

if I apply my material on to this

default plane

and then select that plane

and again we need to

enable the same properties because it's a different

object now so I'm going to go into the attribute editor

redshift enable testellation

and enable displacement

and you can see it's already working

so these values work

based on the level

of scale that you have for the object

and it's not very intense for our larger plane

because it's a large size scale of the object

so you can see it's already actually working

so for the other object what I need to do

or actually if you were just using the default

sizes you just need to lower these values

so just for example since we're here

I will lower 2.5

and probably just stick with the displacement scale

and you can begin to see it coming through

it's kind of hard to tell because of the lighting

but it is beginning to displace my geometry

based on the texture

now I'm going to go ahead and disable this and

actually just delete it

and come back to my larger scale plane

so for this particular one

I'm going to come back into the attribute editor

and we just need to increase these values

in order to match up

to the scale of our plane

this is the first value

I would adjust as the displacement scale

so let me increase it all the way up to 25

and it's going to begin to displace

now it's not going to be as strong again because

my maximum displacement is back down to 1

so if you need to increase these values

to a higher number

you will just increase them pretty much together

so one will

increase the displacement scale of the texture

and the other one actually pushes out

and sets the maximum displacement

for that texture

so if I go ahead and take a look at the side

you can already see

it's beginning to displace it

so let me go higher let me go 50

and 50

and I'm going to go ahead zoom in a little closer

so here we're using this texture right here

it's using the values of black and white and grayscale

and it's beginning to

displace our geometry on that fly plane

so our flat plane is still low poly

but at render time

it's tessellating and beginning to displace it

so again these two values work pretty much together

if you have to scale your objects to a higher value

higher size in units

so you just increase these two numbers

otherwise if they are just default sizes then you just

work

with the lower values for each of the displacements

you also have enable auto bump mapping

this is usually always on I don't change it

but basically this

enables you to have

that surface detail that you

usually get through in normal map

but for displacements that has just on and off

and it gives you that extra detail

on an object that surface detail

and the other property

that you may want to tweak depending on the object

is the maximum subdivision

and this is what tessellates your geometry

at render time

so this is the amount of quads that it tessellates

when you render

so default of X is good

if you needed to lower for performance reasons

maybe you go down to 4

if you go down too low

you may not have sufficient geometry to tessellate

so 6 is usually good

but sometimes you may need to lower it

depending on how heavy your seam is

and then you have

you do have a few more other options

as well as the minimum

edge length this can often be tweaked

in order to adjust the distance of this minimum edge

length of the objects being pushed out

so this also begins to tessellate

more aggressively when you lower this

but again you don't really need to touch these

most of the time

when you just want to get something

quick to render in displacements and make it look good

you just adjust the maximum displacement

and the displacement scale

alright so let's go ahead and complete

this entire

material and assign the other textures to it

so all we're using right now is the displacement

so let's assign an actual albedo and roughness

and see how it all comes together

so I'm gonna go ahead and select this plane

and switch over to the RS displacement tab

which is a texture

and I'm gonna assign a color

let's assign the file

folder icon and again

off screen I'm just going to choose the albedo

and then I'm also going to assign a roughness

although we don't really need the roughness right now

because how the light is hidden

it's not going to really matter

unless I see it from a different angle

but just to complete this let's go back

and let's assign a roughness

let's go to roughness

checkerbox file image name

and I'm going to assign roughness

and then I'm going

to change my color

space to Rob because it's a roughness texture

just like I've showed you in one of the previous

tutorials

and I quickly need to jump over to the hyper shade

and reconnect

let me regrout this

I need to reconnect the out alpha for the roughness

and instead of out alpha

I need to use it on the channels

and reconnect it back into reflection roughness

let's go ahead and close this

and I do not need to use an oral map

because we already have that surface detail through

the displacement texture

so here's what it looks like

it's displaced in our

geometry and it's looking fantastic

now before we finish off this tutorial

I do want to show you

how to create your own

custom ones just in case you wanted to experiment

of course

you can alter them in a lot of different softwares

but let's say

if you wanted to

experiment with Photoshop and just create your

grayscale textures and have them

actually push and pull your geometry and

teslate it and displace it

here's how to do that very quickly

so here in Photoshop I'm gonna create a texture

I'm gonna go to file new and I'm gonna do a 1k

usually you may want to do a high resolution texture

maybe 24k

but just for this example I'll use the 1K 1024 by 1024

now for height fields or for height maps the splicemen

so you want to actually change the

bit size from 8 to 16

this maintains and has more

color information or more gray scalvalue information

so you do want to change this to 16 bit rather than 8

and then you also want to change RGB color

and you want to deal with grayscal values only

so that's the one thing you do want

to update and change

if you're doing this

for experimentation or just want to create your own

in Photoshop manually

let's go ahead and hit create

so the way the gray scale and the black

and white values work

for height maps or for displacement textures

is black is the negative value

which lowers your geometry

and white is depositor value which

raises your geometry

and gray scale is going to be in between

so you want to start with a gray value

so it gives you a middle

from which you can push and pull to displace

so you would start with somewhere like a gray scale

in the middle

usually like a 127 on across RG and B

you fill that

so that's going to be your middle value

and then you create white

to rays and black values to lower

now I already have a custom one created

so here's what it looks like

so you don't have to see me do this

so I did exactly what I'm telling you

I created a grayscale background

then I have a white

square which will push and raise the geometry

and I have a darker value closer to black which will

push and lower the geometry

so here's what this is going to look like

so back in redshift or back in Maya with redshift

let me go ahead and create a new plane

so we can just have this right next to our plane

and I'm going to go create

a whole new plane

and I'm just going to make it larger

we're going to leave the subdivision width and

high to the same values

so let's do

let's do a little smaller than the one that we had

before 300 by 300

let me go ahead and raise this up

let's rotate it

I'm going to hold J

rotate snap and let's create a whole new material

so that way you get to see it again

a little bit quicker

now let's go to Hypershade

let's clear our graph

let's create a new retrift material

let's rename it Real Quick

Redshift Displacement

PS for Photoshop

and let's hit tab and search for displacement

and here's our retch of displacement

insert that let's connect it to Displacement Shader

select the RS Displacement node

go into the property editor on the texture map

going to hit the checkermark then assign a file

image name folder icon

and

opens me up into source images folder of my project

and I'm just going to assign that PNG

texture that I saved

so I saved my textures my height maps as a PNG file

you can save it as a TIFF or you can save it as a PNG

either one will work

so in my case I have a PNG

and that's the one I saved

that I showed you in Photoshop

so now I'm just going to go ahead and close this

select my plane assign that material onto it

nothing will happen

so but I'll do a quick run right now

because we do need to go into the attribute editor

and turn on those properties

when I enable IPR

select my plane

let's go to the attribute editor and

enable those properties

so again under our shape node

open up redshift tab

enable tessellation

and enable displacement

and it's already coming through but again very lightly

not a strong because of our displacement

scale and maximum scale values and because our

size of this plane of this object is large

so I'm going to go ahead and

increase both of these to let's do 25

for both

and let's begin to this place a geometry based on

a quick custom texture we created in Photoshop

if I go even more to this place even further

let's go even 40

for both

and I'm beginning to have a little bit of

kind of a little of distortion going on here for

as it begins to displace

so for this particular value

you can come into minimum edge length

and you can adjust this value

in order to

kind of push or pull some of this back and kind of fix

the amount of distillation that happens on the minimum

edge length

so this was a good candidate to possibly tweak

the minimum edge length

because the value of 4 kind of creates a bit of

weird artifact and effect

so by lowering this

I can fix it and make it look better

if I go higher

it may actually break even further

so the value of 4 this is what it gives us

value of 2 looks better value of 1

looks even better

so you can have a lot of fun with displacements

you can create quick environments

quick scenes setup

with either your own custom

displacement textures

or the ones you find online

or the ones you author yourself