Histogram Scan

Histogram Scan is a node that offers an easy way to remap the contrast and brightness of input grayscale maps. This node is very basic yet helpful and can be used to dynamically grow and shrink masks.

So, let us work with this node:

1. In Figure 8.68, you will notice that the Perlin Noise node’s height is quite smooth – what if we need Perlin Noise to have flat height peaks like the Grand Canyon? This is where Histogram Scan comes in handy. Therefore, add the Histogram Scan node into the GRAPH window.
2. Connect the Perlin Noise node’s output to the Histogram Scan node’s input and connect the Histogram Scan node’s output to the Shape Splatter node’s Background Height input.
3. Then, change the Histogram Scan node’s Position parameter to 0.43 and the Contrast parameter to 0.69 in the PROPERTIES window under the INSTANCE PARAMETERS settings, as shown in Figure 8.69:

Figure 8.69 –...