Creating the node tree

Open a new Geometry Node editor on the default cube. Once you’ve done that, you’re ready to start the exercise. The first step is to create the stem of the plant. Let’s begin.

Creating the stem

In this section, we will add a Curve Line node, to which we will add some noise displacement using a Set Position node. After that, we will give this curve some thickness using a Set Curve Radius node:

1. Let’s start by adding a Curve Line node to our Geometry Node editor. This will be the base of our stem.
2. To visualize this node, connect it to the Group Output node.
3. After that, add a Set Position node after the Curve Line node to start giving displacement to the curve.
4. We will also need a Combine XYZ node to split the Offset vector value into its respective X, Y, and Z components. Drop this Combine XYZ node into the Offset input of the Set Position node.

If you’ve followed these steps correctly, this is...