The River Device lets you manually create rivers and their accompanying river valley and insert them into a terrain. The rivers defined by this device
Typically you would use this to specify major rivers in your world that you know you want to have in a certain location. If you need rivers to be automatically generated on the terrain instead, look to the Define Water device.
You can create networks of rivers that feed into each; each defined river segment (reach) can have all of its parameters set seperately.
How to Use
Add a River device into the device workview as per usual. Much like the Layout Generator, the River device functions completely visually; when you double click on the device, you’ll be cast into the Layout View, where all work on Rivers is performed.
In the image above, there are some parameters and commands on the left-side of the view that control all rivers defined therein. The center of the view contains your scene, and you can visually see all the rivers you’ve created.
Creating a River
Click the “Add/Extend Reach” button in the left side panel:
Then sketch your river course in the viewport.
If you start drawing at either end of an existing river, you wil extend that river; if you draw from somewhere along the course of it, you will add a tributary river that feeds into it.
Click-dragging any part of an existing river will add a new vertex to the river and let you more precisely position it.
- Add/Extend a Reach – Draw in the view to create a new section of river
- Set Reach Parameters
- Copy Reach Parameterds
- Paste Reach Parameter
Tips and Tricks
- Your river will have a very different character depending on which River GCS you select to use for the river.
- Sharp bends in the river valley may sometimes cause odd “kinks” or cliffs in the resulting river valley. These are unsightly but can be effectively removed by eroding the resulting output (See the article on Erosion and River Systems)