# Occlusion

## Overview

The Occlusion distribution samples an ambient occlusion map of the terrain for masking crevices or mountain ridges.

## Parameters

<table><thead><tr><th width="199.7999267578125">Properties</th><th>Description</th></tr></thead><tbody><tr><td><strong>Random Samples</strong></td><td>Uses random samples instead of fixed steps. Can improve performance but causes grain on lower values.</td></tr><tr><td><strong>Horizontal Steps</strong></td><td>The number of horizontal steps in the occlusion computation.</td></tr><tr><td><strong>Vertical Steps</strong></td><td>The number of vertical steps in the occlusion computation.</td></tr><tr><td><strong>Steps</strong></td><td>Multiplier for the overall steps.</td></tr><tr><td><strong>Grain</strong></td><td>Controls the amount of grain in the final mask.</td></tr><tr><td><strong>Occlusion Range</strong></td><td>Allows you to clamp the result of the ao calculation.</td></tr><tr><td><strong>Radius</strong></td><td>The sampling radius of the ao algorithm. Smaller values capture smaller scale details, while larger values result in the detection of large scale terrain features.</td></tr><tr><td><strong>Flatten</strong></td><td>Improves detection of detail in flat areas.</td></tr></tbody></table>

## Results

<figure><img src="/files/867RSm12nS1uhclEkmIr" alt=""><figcaption></figcaption></figure>


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