Original subtitles

Our bricks and mortar are looking good, and the basis of the displacement texture is done. Now

it's time to really start cranking up the visual interest, by adding more and more variation.

Let's create some gaps in the mortar, as if pieces of it had broken away.

For that, we'll need yet another Noise Texture.

This time, just like with the chipped texture we made for the bricks, we don't want it to apply

everywhere, but just in some spots. So let's add a Map Range, to clamp the lower end of the texture.

Let's also compress the range a bit from the upper end, to create that extra contrast,

and to avoid sharp edges while clamping, let's set the interpolation to Smooth Step.

Now we can add a Math node at the end of our mortar chain, and set it to subtract,

just like we did with the chipped texture. In fact,

this setup is practically identical to the one we made for the chipped brick texture.

Connecting the Map Range to the subtraction, we see some gaps appear in the mortar texture.

We can take a moment just to organize these nodes a bit.

Looking at the output, the gaps are again hard to see in Eevee,

as it doesn't really display differences in depth.

Though we do at least see how it affects the shading, if we crank up the depth.

Switching to Cycles is when we really see the effect properly.

The gaps that we made go much deeper, and the shadows cast by the bricks really emphasize them.

Now, the higher we set the lower bound of the range, the fewer gaps there will be,

as we are taking just the very top part of the texture.

If we go very low, almost our entire mortar disappears, and that wall probably wouldn't

even stand at all. So let's go back to some intermediate range.

Basically, the size of the noise determines the frequency of the gaps,

while the range determines how much coverage they have on the wall.