Original subtitles

[Autogenerated] in this clip,

we're gonna take a look at the add and remove channel nodes,

so let's start with ad channels.

We're going to bring this up here now.

Add channels, adds empty layer sets or channel sets to our image stream.

Let's open up our control panel now.

You can see right here it says Add channels.

So we're gonna say channels,

we're going to add new channels so we're gonna create

depth because we don't have it.

So by selecting depth,

what it's going to do is it's now going to put depth into

the primary image stream over here, and if it doesn't exist,

it's going to replace it with the color that is defined here.

Now we can increase this color,

and you can see that it is adding red to the channel.

Now.

Why is it read?

Well, that's the interesting thing about depth,

and you'll see that depth automatically is checked off Z.

Any time that nuke stores new data in a single channel,

it will always be in the order of channels that are constructed,

which is red.

Its first green, a second blues third RGB.

So whenever you have a single or any other black and white channel.

It tends to store them in the first available channel.

We also call the scaler channels because they only have one value.

The color is here to only add color to a new channel that you create.

So typically the ones that are already set up already have like specifics,

that are associated with them.

So let's not create one of those.

Let's create something completely new.

Let's call this one.

We'll call this one multi Matt, and we will populate it with the automatic red,

green, blue and Alfa and will select.

Okay, and now you can see that it's added.

Those channels is called multi Matt, and you can see here they are.

And we can increase a value because they're created brand new.

We can give them an initial state.

That's what the colors force.

I'm gonna just set these 20 and you can also tell it to create other

channels so we can tell it to create another new channel.

And we'll call this multi Matt to our GBS and we'll select okay,

so this is now created to entirely new channel sets.

Now what we can do is we can use our copy node to bring in are

additional chills Now that they exist and we can go over here

it's like they're copter Matt.

And let's select,

Won't you met and bring this up and we're gonna copy

the channels right here of RGB a Red.

We're going to send it to multi Matt Read.

There we go and then we're going to copy the green to multi Matt Green.

We're gonna copy the blue to multi Matt Blue and now we have copied

those into their But we've set it up by adding channels.

We also were able to do this with shuffle note,

but the ad channels allows us to create a default value.

It also gives us mawr control where we can set up entire

channel sets or an individual channel.

Now let's take a look at removing channels Now the removed channel.

Let's go back to RGB.

A remove allows us to remove channels that we don't need any more.

So if I have just look at the default of remove and if we look up here,

you can see that we have rgb rgb a Alfa multi map multi Matt to a Oh,

and then this says operation is to remove and it's all channels.

So if I go to here and then we'd go to her drop down,

you'll notice that there are all gone except for the default rgb A and Alfa.

Everything else is set over here because there are no channels.

In fact, our images black.

Now we may not want to remove all our channels.

So what we can do is we can say, You know what?

Let's just remove that extra multi Matt that we didn't use.

Now it gets rid of just that.

We can see that there's RGB, a Alfa Multi Matt and a Oh, but you know what?

I also and want to remove a O.

So now I just have rgb a Alfa and the multi man.

It allows us to get rid of our extra channels,

but if there's a lot of extra channels, let's said suspected none and none.

We can also switch the operation to keep,

which means it's gonna throw everything out.

But keep what you have selected here like a oh,

in this case, it has thrown everything out,

but it has chose to keep it so if I go to a l.

There it ISS now If I wanted to do that,

I would probably also want to shuffle this back into RGB.

So that way RGB isn't blank.

So using ad channels and remove channels in many ways duplicates

functions of other nodes but also helps to simplify and keep the

functionality streamlined and more efficient.

And the next clip, we're going to take all of this and create a multilayered xar.