Folds the input according to the Folding Line. Imagine an Absolute Node where the 0 is defined by the Folding Line. The parameters are:
- Folding Line: The point relative to the input MinMax where the Input starts being reversed
- Relative To: What should stay constant. If set to Bottom, the minimum value will always be the same, while if it’s set to Top it will be the maximum value.
Setting the Folding Line to 0 does nothing while setting to 1 fully reverses the noise. Any point in between will act as an Absolute Math function.
Default Noise
Fold at 0.5
Fold at 1
Examples
Feature Extraction
Notes
We start by creating the terrain using a simple Perlin Noise with a few octaves.
Next, we connect it to the Height Output to ensure the data will be used, and then extract features using the Get Slope and Get Cavity nodes. We use the data generated by these nodes to select specific regions—such as areas with high slope or regions where the terrain is relatively flat—and paint them using the Color Output.
Finally, using the Fold node, we transform the flat region mask into a selection of all concave and convex areas.
Node system
Result