This project presents three different ways to use the Mask generation Path node. This node is used to generate pseudo-random paths. The main use is the creation of rivers, but there are certainly other possible uses.

1 - Add random rivers on a flat terrain

The Path node gives better results with flat terrains. This is an example of a fairly flat terrain where the generated mask is used to create a river that cuts a bottleneck in a rocky landscape. The image on the left is the input terrain, the center is the mask generated, and the right image is the result.

 

2 - Add random marshes on a flat terrain

We changed the settings of the Path node to achieve a very different effect. We added a step of smoothing the borders so as not to have a cliff effect around the water. Again, on the left is the input terrain, the center is the mask generated, and the right image is the result.

3 - Generate paths in a landscape

Here, we modified the parameters of the Path so that it generates a simple path. We combined this mask with a painted mask to remove the parts that did not interest us. We played with the Seed parameter until we got a result that adapted well to the configuration of the terrain. Left: the input terrain, center: the mask generated, right: the result.


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