Thermal Erosion

Applies a thermal erosion effect on a static noise.

The principle of the thermal erosion is to reduce the slopes in images. It simulates the erosion of a terrain: when there is a high point in a terrain, the effect of gravity will tend to move matter from higher points to lower points, thus reducing the slopes. In the case of pictures, for each pixel, if it is a lot higher than its neighbors, a quantity of the pixel value is transferred to the neighbors according to the height difference.

To obtain good results, a high number of iterations is required. However, this effect requires a lot of computation time, and it increases with the number of iteration. That’s why it is not suited for real-time applications, but still can be used during loading times.

Node inputs/outputs

The post-process parameters are:

The output value is a Static Module.


Thermal erosion applied on a rasterized Checkerboard