Difference Scalar

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Difference Scalar


The Difference family of nodes finds the difference of the two input values. The difference is the absolute value of the Input value minus the Input 2 value:

Output = absolute value of( Input minus Input 2 )

For more information about absolute values, see the documentation for the Abs Colour node.

For colours the calculation is done on a component-wise basis, for example:

Output.red = difference of Input.red and Input 2.red
Output.green = difference of Input.green and Input 2.green
Output.blue = difference of Input.blue and Input 2.blue

These nodes just have one other setting, which lets you choose a node for Input 2.


  • Name: This setting allows you to apply a descriptive name to the node, which can be helpful when using multiple Difference scalar nodes in a project.
  • Enable: When checked, the node is active, and when unchecked the node is ignored.
  • Input 2: This is where you specify the node for the Input 2 value.

A single object or device in the node network which generates or modifies data and may accept input data or create output data or both, depending on its function. Nodes usually have their own settings which control the data they create or how they modify data passing through them. Nodes are connected together in a network to perform work in a network-based user interface. In Terragen 2 nodes are connected together to describe a scene.

A scalar is a single number. 1, 200.45, -45, -0.2 are all examples of scalar values.