# 涂抹

## 概述

Smear（涂抹）效果模拟水粒子沿分布向下流动并在下游侵蚀它们。这类似于其他应用中所知的河流平流和颜色侵蚀。它旨在与可使用它来创建冲刷沉积效果的梯度材质结合使用。

## 参数

<table><thead><tr><th width="199.7999267578125">属性</th><th>描述</th></tr></thead><tbody><tr><td><strong>角度随机性</strong></td><td>为 <strong>生成角度范围添加额外的随机性。</strong></td></tr><tr><td><strong>随机概率</strong></td><td>粒子生成的概率。</td></tr><tr><td><strong>生成角度范围</strong></td><td>粒子将生成的坡度角度范围。</td></tr><tr><td><strong>更新间隔</strong></td><td>控制模拟步骤更新的频率。</td></tr><tr><td><strong>迭代次数</strong></td><td>模拟迭代的次数。</td></tr><tr><td><strong>步长</strong></td><td>控制每次更新时每个粒子移动的距离。</td></tr><tr><td><strong>惯性</strong></td><td>控制粒子在移动过程中对地形变化反应的速度。</td></tr><tr><td><strong>类型</strong></td><td>指定被传输值将如何写入遮罩。</td></tr><tr><td><strong>清理步骤</strong></td><td>在粒子稳定后应用额外的清理模拟步骤。</td></tr></tbody></table>

## 结果

<div><figure><img src="/files/6f823a72100a7e3b045e829cbb6af9ebb020f204" alt=""><figcaption></figcaption></figure> <figure><img src="/files/446e8f63433e7d9e76c9dd308a19e9f946f9a00d" alt=""><figcaption></figcaption></figure></div>


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