Geometry

Use Blender's powerful geometry nodes to create procedural terrains that are easily changed, rearanged, and optimized for your scenes!

Getting Started

First thing to do is click the large `Create Terrain` button in the right hand viewport panel.

This will make the new object as the pinned object.

From here you can add more layers, change the settings in the `Layer` tab, blend your layers so they only show up in certain sections from the `Blending` tab, or modifiy the layer data in the `Modifiers` tab.

See below for more explanation on each section:

Grid Settings

Layers

Blending

Modifiers

Erosion

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Export Height Map

You can export a height map from the mesh you have created in True-Terrain.

From a True-Terrain Mesh

With the True-Terrain mesh selected go to the Geometry tab in the side panel and click on the Terrain Layer Menu between the Remove Layer and Move Layer Up buttons to the right of the Terrain Layer List.

At the bottom of the menu click Export Height Map.

From here a browser window will open up for you to select a directory to save your height map after it is exported. In the right side panel you will see the following options:

• Min Value: choose what value should be the minimum pixel value of this image. Remember non-exr images can only save values from 0.0-1.0
• Max Value: choose what value should be the maximum pixel value of this image. Remember non-exr images can only save values from 0.0-1.0
• Extension: choose what file type to save this as
• Open After: Open up the directory after saving for quick access to the height map.
• Install to True-Terrain: Install this height map into True-Terrain height maps after saving.

From a Non-True-Terrain Mesh

Select a mesh that was not created with True-Terrain.

In the Geometry tab of the True-Terrain panel click the 'Bake Object to Height Map' button.

This will pop up a panel with the following settings that will update the visible mesh to help you visualize what the heightmap will look at:

• Resolution: What resolution do you want the image to be at
• Blur: Blur the height values. Helpful if the resolution is higher than the mesh's resolution and faces begin to show despite being asked to smooth the normals.
• Overscan Blur: If the mesh isn't a perfect rectangle and some over hang will occur some trangulaing looks may happen. This setting helps to offset this triangular look.

From here a browser will open with the following settings:

• Min Value: choose what value should be the minimum pixel value of this image. Remember non-exr images can only save values from 0.0-1.0
• Max Value: choose what value should be the maximum pixel value of this image. Remember non-exr images can only save values from 0.0-1.0
• Extension: choose what file type to save this as
• Open After: Open up the directory after saving for quick access to the height map.

Camera Culling

Remove parts of the terrain based upon what is visible in the active/selected camera.

Enable Culling

Toggle the geometry culling.

Culling Type Algorithm

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Use Custom Camera

Use a camera that is not neccesarily the active scene camera.

Padding

Vary the amount outside of the camera's view that will still be visible. Sometimes, depending upon the size of each face, faces that have less than 50% of themselves visible in the camera view will be removed leaving visible holes. This padding allows for increasing the need range so that those faces won't be removed.

Use Backface Threshold

Remove faces that point away from the camera, ie are most likely not even visible to the camera due to being behind other faces.

Backface Threshold

How far away a face must point in order to be culled.

Use Scatter Close to Camera

Mainly for Scattering, but this will allow for assets that do not have their origns in the camera's view but are still visible to the camera to be not culled.

Distance (Scatter Close to Camera)

How far away from the camera a face needs to be to not be culled.