Terrain transformation Apply curve node

Adding an Apply curve node

This node modifies the terrain profile by changing the height of each input vertex vertices on a curve that define the terrain heights.

To add an Apply curve node, right-click in the Graph Editor and select Create Node > Terrain Transformation > Apply curve.

Double click on the node to open its parameters:

Editing curve heights manually

By default, the Manual curve editing mode is activated.

Select your cursor size from small, medium, and large.

Using the smallest cursor makes detailed changes to the heights; using a larger cursor makes changes to larger areas in the terrain.

Small, medium, and large cursor to make changes to the terrain heights

Click and drag the mouse to change the terrain heights.

When you move the mouse over the terrain, the height under the mouse is shown as points on the curve.

Green point in the curve represents the position of the mouse in the terrain.

Click OK to validate.

Smoothing the curve

Click on the Smooth button to smooth the heights of a curve. You can click several times to smooth more.

Smoothed curve

Adding control points

Once you have edited your curve, you can switch from the Manual mode to the Point mode (like a Bezier curve) to add control points. The control points are displayed in increasing subdivisions of five, from 5 to 50 points. A higher number of control points gives you more control over the changes you make to the curve.

Click on the Point button in the Parameters dialog.
Select the maximum number of subdivisions from the drop-down list.

Click OK to validate.

Editing a control point

The Automatic point editing option is selected by default. This option does not use anchor points:

Edit the control points by clicking on a point and dragging the mouse to a new position.

To edit the curve using anchor points, right-click on a point and select either:
- Smooth point: Drag the anchor points to smooth the point. The anchor points are paired, resulting in a smooth curve.
- Angle point: Drag the anchor points to smooth the curve. The anchor points are unpaired.

Click OK to validate.

If you have not yet edited your curve in the Manual mode, you can click on the curve in the Point mode to add and edit points.

Deleting a control point

To delete a control point, right-click on it and select Delete this control point in the contextual menu.

Resetting the curve

Click on the Reset button to reset the curve to the default values.

Video tutorial

Watch our Apply curve node video tutorial.

Parameters

Parameter	Use
	Selection of the size of the cursor used to distort the curve.
	Smooths the current curve
	Resets to the default curve (no modification to the terrain)
	Switches to the manual editing mode using brushes
	Switches to the control point editing mode