# Light Emission
{% hint style="warning" %}
This feature requires Minecraft client 1.21.2 or greater.
{% endhint %}
## Items
{% hint style="warning" %}
This won't really emit light, it's only a glowing effect. This is a limitation of the game.
In the future I might find a clean way to implement smooth light that moves with the player, but for now there is not feasible solution.
{% endhint %}
{% stepper %}
{% step %}
Create your texture.
{% endstep %}
{% step %}
Create a new `Java Block/Item` model in **Blockbench**.
Note: In this case I set `Parent Model` to `item/paper` to inherit the `display` properties (how it's shown in hand, on ground etc.).
{% endstep %}
{% step %}
Create your model. For example you can extrude the texture like I did.
{% endstep %}
{% step %}
Adjust the model in the center.
{% endstep %}
{% step %}
Select all the cubes (press `CTRL+A`), right click and set the desired light level.
{% endstep %}
{% step %}
Save the file: `contents/test/models/block/test_light_emission_item.json`
{% endstep %}
{% step %}
Create the configuration.
**Old method**
```yaml
info:
namespace: test
items:
test_light_emission_item:
name: test_light_emission_item
resource:
material: PAPER
generate: false
model_path: item/test_light_emission_item
```
**New modern method (1.21.4+)**
```yaml
info:
namespace: test
items:
test_light_emission_item:
name: test_light_emission_item
graphics:
model: item/test_light_emission_item
```
{% endstep %}
{% endstepper %}
## Blocks
{% hint style="warning" %}
You must use `REAL_TRANSPARENT` block type if you want to make only a part of the block glowing and not all the block.
This happens because the game doesn't support transparency in `REAL` blocks.
{% endhint %}
{% hint style="info" %}
If you do not want to use `REAL_TRANSPARENT` you can create a block with a single layer which will all be glowing.
{% endhint %}
{% stepper %}
{% step %}
Create your texture.
{% endstep %}
{% step %}
Separate the glowing layer from the base layer into two images.
`contents/test/textures/block/test_light_emission.png`
`contents/test/textures/block/test_light_emission2.png`
{% endstep %}
{% step %}
Create a new `Java Block/Item` model in **Blockbench**.
{% endstep %}
{% step %}
Create two cubes, one for the base and one for the glowing layer.
{% endstep %}
{% step %}
Assign the two textures to the two different layers by drag and drop into the cubes.
{% endstep %}
{% step %}
Right click the glowing layer and set the desired light level.
{% endstep %}
{% step %}
Save the file: `contents/test/models/block/test_light_emission.json`
{% endstep %}
{% step %}
Create the configuration.
**Old method**
```yaml
info:
namespace: test
items:
test_light_emission:
name: test_light_emission
resource:
material: PAPER
generate: false
model_path: block/test_light_emission
behaviours:
block:
placed_model:
type: REAL_NOTE
hardness: 1
```
**New modern method (1.21.4+)**
```yaml
info:
namespace: test
items:
test_light_emission:
name: test_light_emission
graphics:
model: block/test_light_emission
behaviours:
block:
placed_model:
type: REAL_TRANSPARENT
hardness: 1
```
{% endstep %}
{% endstepper %}
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