# Manual Sub-Layer Drawing

You also have the ability to manually draw Sub-Layers on the terrain. You can then add, multiply, or subtract all your masks using the manually drawn values.

To draw them, select the Sub-Layer you want to draw in the Landscape's Paint tab and assign a **Non-Weight Blended** Layer Info to it.

<figure><img src="https://3751470283-files.gitbook.io/~/files/v0/b/gitbook-x-prod.appspot.com/o/spaces%2F9KuznrlYB4kqrVq5qJMd%2Fuploads%2FljD0vel63b5st4lj4hwk%2Fimage.png?alt=media&#x26;token=4f192805-bcce-4156-bb6d-5120a595b83e" alt=""><figcaption><p>Be sure to set it as "Non Weight-Blended" !</p></figcaption></figure>

Once done, you'll be able to manually paint the Sub-Layer on your Biome using Unreal's paint layer landscape features.

## Demonstration

{% hint style="info" %}
These illustrations are in LOOKDEV View.

The Sub-Layer 1 in Red is **under** the Sub-Layer 2 in Green.
{% endhint %}

Even when drawn, Sub-Layers keep their order.

![Sub-Layer 1 (red) under the green Sub-Layer 2.](https://3751470283-files.gitbook.io/~/files/v0/b/gitbook-x-prod.appspot.com/o/spaces%2F9KuznrlYB4kqrVq5qJMd%2Fuploads%2FpAog1w99m3yVwWcgU366%2Fimage.png?alt=media\&token=3490f012-92ff-4ad8-8ac4-a67b1598f483)

Using the Manual drawing mode settings that are at the top of the Mask Settings, we can change how the masks overlap with the manual drawn section.

![](https://3751470283-files.gitbook.io/~/files/v0/b/gitbook-x-prod.appspot.com/o/spaces%2F9KuznrlYB4kqrVq5qJMd%2Fuploads%2FgtASGs4N1LmmtnRCdNNS%2Fimage.png?alt=media\&token=e0bf1f20-5c0b-43e7-9457-9792ef4dcadb)

Here are the 3 modes of painting in action :

### + (Addition)

![](https://3751470283-files.gitbook.io/~/files/v0/b/gitbook-x-prod.appspot.com/o/spaces%2F9KuznrlYB4kqrVq5qJMd%2Fuploads%2FtpQGAmtGHDyryuJQqACX%2Fimage.png?alt=media\&token=7c52f747-faa3-49b3-99e5-efa38634d8e5)

### \* (Multiply)

![](https://3751470283-files.gitbook.io/~/files/v0/b/gitbook-x-prod.appspot.com/o/spaces%2F9KuznrlYB4kqrVq5qJMd%2Fuploads%2FtCRnEGzbxWnuGRyevzfL%2Fimage.png?alt=media\&token=7306b15d-1ffa-44c5-811c-741f57809a58)

### - (Subtract)

![](https://3751470283-files.gitbook.io/~/files/v0/b/gitbook-x-prod.appspot.com/o/spaces%2F9KuznrlYB4kqrVq5qJMd%2Fuploads%2FJxw41O17kWzZqixGpRXm%2Fimage.png?alt=media\&token=3b1b264a-122d-4f97-a601-d93af6e67d43)

Depending on your needs, manually painting can be a powerful way of using masks only on some parts of the landscape, excluding the mask somewhere, or forcing it on other places.

{% hint style="info" %}
If you subtract a mask on an entire landscape chunk, then it won't be computed, like this:&#x20;
{% endhint %}

![](https://3751470283-files.gitbook.io/~/files/v0/b/gitbook-x-prod.appspot.com/o/spaces%2F9KuznrlYB4kqrVq5qJMd%2Fuploads%2F7HXgbnwAQJlTH7yCfRLW%2Fimage.png?alt=media\&token=126371e0-2fb9-400a-8735-bf09db7470ec) ![Shader Complexity](https://3751470283-files.gitbook.io/~/files/v0/b/gitbook-x-prod.appspot.com/o/spaces%2F9KuznrlYB4kqrVq5qJMd%2Fuploads%2FeNvEkADthjenhyhMWc8z%2Fimage.png?alt=media\&token=9661fb66-3ee2-4fe0-bbde-4c073b3a9cec)

If you want to paint layers on top of everything else, you'll need to use **Correction Layers**.&#x20;

See [Biomes Workflow](https://sylvl.gitbook.io/panoramake-release/setting-up-instance/biomes-workflow) for more information.