Description

The Blend (Height) node performs a blend between two heightmaps using a range of properties to control the transition.

The node takes two inputs, a Foreground (the upper layer heightmap), and a Background (the lower layer heightmap). You can control the point at which these heightmaps intersect via the Offset property, and further modify the transition effect by changing the Opacity, Contrast, and Falloff settings.

In addition to the blend result, the node also outputs a Mask. You can use this mask to drive the behavior of other nodes, such as Blend (Material).

Usage

You can follow these steps to blend two heightmaps using the Blend (Height) node.

Ensure that the heightmaps you want to blend are on your Node Graph.
Create a new Blend (Height) node on the graph. It can be found under the Composition category in the Node Library.
Connect the Bitmap you wish to use as the Foreground into the corresponding input port, and the other Bitmap into the Background port.
View the blend results by bringing the Blend (Height) node into the 2D and/or 3D Viewports, and adjust the node properties to modify this result.

Node Reference

Node category	Composition
Node execution style	Automatic

Ports

Input Name	Input Type	Description
Foreground	Bitmap	The heightmap you wish to blend as the Foreground layer.
Background	Bitmap	The heightmap you wish to blend as the Background layer.

Output Name	Output Type	Description
Height	Bitmap	The new heightmap which the node produces by blending the two inputs with the specified parameters.
Mask	Bitmap (Mask)	A grayscale mask that this node generates from the heightmap output.

Properties

Property/Setting	Description
Offset	Set the height point at which the two inputs intersect as a value between 0 and 100.
Contrast	Increase the contrast of the Background input by a value between 0 and 100.
Opacity	Set the overall opacity of the Foreground input, as a value between 0 and 100.
Falloff	Control the rate of height transition at the points where the two heightmaps intersect, as a value between 0 and 100. Higher values produce a more contrasting effect. Effectively, this value modifies the brightness and contrast levels of the Foreground input.