All language subtitles for CustomMetahuman_3.3.mp4

Let's bring our new textures
into Unreal Engine now.

I will export two texture sets.
We have seen in the previous chapter,

that the metahuman characters
mainly rely on high resolution normal maps

while using lower resolution
base color maps

for better performance.

So I'm exporting

my textures in 8K as well as in 4K,

and we will then import the 8K normal maps

and 4K base color maps into Unreal Engine.

Before importing, let's rename the files
that we actually need.

You don't have to rename them,

it's just a way to keep things organized,

and helps me to locate the correct files later.

From the set of 4K textures,
I need the face and body base color

and from the 8K texture set
I renamed the face and body normal maps.

In Unreal Engine,

create a new folder for the new textures
and then just drop them into our Unreal Engine project.

Next,

let's duplicate our body and face
material instances,

just to keep the original
in case we ever want to restore

the default materials.

Right..

Let's begin with the body.

Open up the body material and assign the
new textures to their respective slots.

There's nothing else
we need to consider for the body,

so this is done.
For the head however,

there is the issue of the
additional color maps and wrinkle maps.

Let's begin with the normal map.

If I assign our new normal map to the main

normal map slot
and leave the original wrinkle maps,

we might run into problems
when animating the face.

Let's have a look at the ARKit
mapping animation for the face.

You see,

whenever the wrinkle maps are coming into play,

they replace my normal map.
The scars disappear.

A simple solution would be to plug
the main normal map into all wrinkle map slots.

But this way we lose the beautiful wrinkles.

So let's undo this.

Now let's look at the color map.

If I plug the new base
color texture into the main slot,

and look at the animation again,
we run into a similar issue.

The main base color is overwritten

by the additional color maps.

In this case, the quality loss might be neglectable,

so we actually could just use
one single based color map

for all our four slots.

But I will show you how you can quickly
create new color and wrinkle maps

with all the details
that we have created in Substance Painter.

Right. Let's export those six texture maps

and then open our Substance project again,
and drop the textures into the project.

and then open our Substance project again,
and drop the textures into the project.

These textures

don't have a corresponding UDIM tile for the body,

so if we just drop the color
map into the base color slots

of our Base_Textures layer,

Substance will assign it
to both UDIM tiles.

We obviously don't want that.

There is a very simple workaround
for this, though.

We just need to duplicate the Base_Textures layer

and then separate head and body
by using the UDIM mask feature.

If you click on the layer mask here,

you can select which UDIM tile
should be used with this layer.

So let's deactivate the face tile
for the first Base_Textures layer.

And for the second layer
we deactivate the body tile

This way we have actually separated body
and head and can now apply our textures.

Drop the first base color and wrinkle map textures

into the slots of the head
layer and export the textures.

As before, I will export 4K

as well as 8K textures.

Then repeat the process again
for the second and third color

and wrinkle maps.

And finally rename
the textures that we need,

which is the 8K normal map (1001)

and the 4K base color map (1001).

Drop those six newly created textures
into the project

and assign them to the slots in the head
material instance.

Boom! We are done.

So let's take stock

of what we have achieved so far.

We have created a base
metahuman character.

We then have modified the mesh of the head

and body without breaking the control
rigs and blend shapes.

We have created a high poly

detailed sculpt and baked those details
into the normal map,

and we have painted new textures
which work

with all the wrinkle maps of the face.

The last modification
that remains to be done,

before we begin adding things
like clothes to the character, is the hair.

So in the next chapter, we will create a
new groom asset for our Hero.