Simplygon 10.2.11500.0

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HLOD: Landscape culling ​

Use landscape culling to remove the parts of the simplified HLOD mesh that is located underneath the surface.

INFO

You need to have set the Proxy LOD module / Hierarchical LOD plugin to use Simplygon to be able to use Simplygon for your HLOD generation. See Getting started to learn how.

1. Set up the landscape as a culling geometry ​

Find your landscape actor(s) in the World Outliner and in the details panel, check "Use Landscape for Culling Invisible HLODVertices".

Figure 1: How to enable landscape culling on a landscape actor.
Figure 1: How to enable landscape culling on a landscape actor.

INFO

If you use LandscapeStreamingProxy Actors you need to set this setting on all the proxy actors, not just the parent Landscape.

2. Set HLOD proxy settings ​

Select the simplification method for your HLOD generation and in the Proxy Settings, check Enable Volume Culling.

Figure 2: HLOD settings to enable landscape culling.
Figure 2: HLOD settings to enable landscape culling.

3. Build ​

Build the HLODs and wait for the process to finish.

4. Result ​

The following images show pre- and post HLOD generation with landscape culling enabled.

Figure 3: Pre-HLOD generation.
Figure 3: Pre-HLOD generation.
Figure 4: Post-HLOD generation with landscape culling enabled.
Figure 4: Post-HLOD generation with landscape culling enabled.