---
title: Adding Auto Glow Texture
hide_meta: true
---

# How to use the Auto Glow Texture feature

## Overview

The **Auto Glow Texture** feature allows you to easily apply glowing effects to textures specific to your model without requiring additional code for handling emissive layers. AzureLib achieves this by using a second texture file with the `_glowmask` suffix in its name, which defines the emissive parts of your model.

For instance, if your base texture is:

`example_model.png`

The glow layer texture would be:

`example_model_glowmask.png`

The `AzAutoGlowingLayer` handles applying the glow automatically, saving time and effort for developers.

## Setup Instructions

### Step 1: Prepare Your Textures

1. **Base Texture**: Prepare a normal texture for your model as you usually would (e.g., `example_model.png`).

2. **Glow Layer Texture**: Create the glow texture by duplicating your base texture and blacking out any areas that shouldn’t glow. Keep the glowing parts visible (e.g., `example_model_glowmask.png`).

   - Only the parts in the glow texture that are visible will glow in-game.
   - Make sure the `_glowmask` texture matches the dimensions of the base texture.


### Step 2: Add the Auto Glow Layer to Your Renderer

The `AzAutoGlowingLayer` is designed to be added to your renderer’s pipeline to apply the glowing effect automatically.

Here’s how you can integrate it into your custom renderer:

```java
public class ExampleEntityRenderer extends AzEntityRenderer<ExampleEntity> {
    private static final ResourceLocation MODEL_LOCATION =
        ResourceLocation.fromNamespaceAndPath("yourmodid", "geo/example_model.geo.json");

    private static final ResourceLocation TEXTURE_LOCATION =
        ResourceLocation.fromNamespaceAndPath("yourmodid", "textures/entity/example_model.png");

    public ExampleEntityRenderer(EntityRendererProvider.Context context) {
        super(
            AzEntityRendererConfig.<ExampleEntity>builder(MODEL_LOCATION, TEXTURE_LOCATION)
                .addRenderLayer(new AzAutoGlowingLayer<>()) // Add the auto glow layer
                .build(), context
        );
    }
}
```

### Troubleshooting

1. **Glow Effect Not Visible:**
   - Symptom: Entity model renders completely black on the exterior of the model.
   - Verify that your `_glowmask` texture is in the correct file path.
   - Ensure the glow texture is named correctly (must include `_glowmask`).

2. **Texture Not Found:**
   - Double-check that your main texture file is correctly registered in the renderer.
   - Confirm the model uses a texture location that matches your `_glowmask` texture pairing logic.

3. **Render Issues:**
   - Make sure your glow texture dimensions match the base texture.
   - Test with a simple texture first to isolate potential issues.

### Advanced Configuration (Optional)

The `AzAutoGlowingLayer` uses a packed light value of `0xF00000` by default for the glow layer render. If you want to customize the glow intensity or modify other behaviors, consider creating a custom layer by extending the `AzAutoGlowingLayer` class and overriding the methods.