Creating the node tree

We will create three subpixels that we will instance using a grid. After that, we will extract the R, G, and B channels from an image to send that information to the Material editor to edit the materials accordingly. Then, we will have a working LED panel.

Now that we know about the techniques that we’re going to use, let’s start by building the node tree we’ll need for this exercise.

Creating a single subpixel

Let’s start off this exercise by creating a single subpixel:

1. Start by adding a Grid node.
2. Since we want three pixels on the X axis, as shown in Figure 12.3, we will need to use a value of 0.333 (1 divided by 3). For our Y axis, we’ll use a height of 1.

Make sure to only use 2 vertices on each axis. Since we’ll be instancing this object a lot, we do not want to put too much strain on our computer.

This is how the node should look:

Figure 12.4: The Grid node...