Heightfield Clip Vertical

Node Description and Purpose:
The Heightfield Clip Vertical node can be used to cut off high or low points of a heightfield. This has the effect of creating plateaus and plains from the clipped areas. Here's an example (click for larger image):

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On the left is the original heightfield. The middle image shows the effect of the Clip peaks setting. The right image shows the effect of the Clip valleys setting. The clipped areas are coloured green.

Node Type: Heightfield Operator

Settings:

• Clip peaks: If this is checked then all parts of the heightfield above the specified height are cut off at that height. For example all parts of the heightfield above 100m are set to 100m.
• Clip valleys: If this checkbox is checked all parts of the heightfield below the specified height are raised up to that height. As an example, all parts of the heightfield below 0m are raised up to 0m.

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 heightmap or heightfield is an array of height values, usually in a grid which describe the height at specific points in a defined area. Heightfields are used to represent real-world and virtual terrain in a specific, easily converted format. Most heightfields can be represented as simple image data in grayscale, with black being minimum height and white being maximum height.