> For the complete documentation index, see [llms.txt](https://sylvl.gitbook.io/panoramake-legacy-docs/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://sylvl.gitbook.io/panoramake-legacy-docs/interface-overview/builder-interface/building-masks/manual-sub-layer-drawing.md).

# 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://content.gitbook.com/content/mlqGhioNPOejbOqn53Jr/blobs/qHlFn11Cm2TQnPmc3L3a/image.png" 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://content.gitbook.com/content/mlqGhioNPOejbOqn53Jr/blobs/VEhID2VZjZMQ6OnNR0rM/image.png)

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://content.gitbook.com/content/mlqGhioNPOejbOqn53Jr/blobs/mQzq4xJLEnmUStgy0alW/image.png)

Here are the 3 modes of painting in action :

### + (Addition)

![](https://content.gitbook.com/content/mlqGhioNPOejbOqn53Jr/blobs/027vr67zy1vLEfRZNgKv/image.png)

### \* (Multiply)

![](https://content.gitbook.com/content/mlqGhioNPOejbOqn53Jr/blobs/TnLLG6mr7V1aoKpNR0K2/image.png)

### - (Subtract)

![](https://content.gitbook.com/content/mlqGhioNPOejbOqn53Jr/blobs/4pZUP6E860SMmiOfImmm/image.png)

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://content.gitbook.com/content/mlqGhioNPOejbOqn53Jr/blobs/89HrDseZPPyjQ3hmFVw4/image.png) ![Shader Complexity](https://content.gitbook.com/content/mlqGhioNPOejbOqn53Jr/blobs/1sYljnuuscJSuxWqZK5V/image.png)

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

See [Biomes Workflow](/panoramake-legacy-docs/setting-up-instance/biomes-workflow.md) for more information.