> For the complete documentation index, see [llms.txt](https://docs.world-creator.com/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://docs.world-creator.com/zh/cao-zuo-zhi-nan/run-simulations/add-sand.md).

# 添加沙子

为了进一步润色我们的地形，我们现在继续到 [模拟图层](/zh/can-kao/terrain/simulation-layers.md)。模拟图层提供高质量的物理模拟，例如 [沙子](/zh/can-kao/terrain/simulation-layers/sand.md), [流体](/zh/can-kao/terrain/simulation-layers/fluid.md), [雪 ](/zh/can-kao/terrain/simulation-layers/snow.md)或 [碎屑 ](/zh/can-kao/terrain/simulation-layers/debris.md)，这些在滤镜栈上方对模拟材料起作用。因为我们想创建一个沙漠峡谷，所以我们将首先使用沙子模拟。

添加沙子图层后，点击 **编辑** 并对沙子生成的区域进行遮罩。默认情况下，每个模拟图层都带有其可绘制的遮罩。

<div><figure><img src="/files/33428e4d23818412c5137edf0a8f26f7fa73ffd6" alt=""><figcaption></figcaption></figure> <figure><img src="/files/afd30bfac57e8549a540f98b90bf86ac2618fa52" alt=""><figcaption><p>沙子遮罩</p></figcaption></figure></div>

为了给我们的沙子添加纹理，我们创建一个新材质，赋予它类似沙子的颜色，并将沙子模拟图层拖入其分布堆栈。这会创建一个 [模拟图层分布](/zh/can-kao/terrain/distributions/layer/simulation.md) ，它引用了沙子图层。

<figure><img src="/files/8ee8132c6b4b85cd730b483440e9a0cc16f82949" alt=""><figcaption><p>沙子材质</p></figcaption></figure>

为了进一步增强场景，我们随后添加第二个使用较暗材质的沙子模拟。这次我们不对其进行遮罩，而是降低 **生成数量，** 这会产生一个漂亮的整体淡化效果。

<div><figure><img src="/files/588ebb083fbcf101f76db9a5fc11e7b4986ce067" alt=""><figcaption><p>深色沙子</p></figcaption></figure> <figure><img src="/files/10d2d7263464a6b409f6212cc6de785cec082ade" alt=""><figcaption><p>深色沙子材质</p></figcaption></figure></div>


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