> For the complete documentation index, see [llms.txt](https://help.maphubs.com/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://help.maphubs.com/advanced/changing-polygon-fill-patterns.md).
# Changing Polygon Fill Patterns
### Option 1: Changing the fill transparency
In the More Colors panel you can reduce the transparency of the fill using the slider or by changing the alpha (A) value
### Option 2: Only show the outline
In the *Advanced* panel of the layer style settings choose *Outline Only*
### Option 3: Using a Pattern Fill
{% hint style="warning" %}
This requires using the [Advanced Map Style Code](/advanced/editing-map-style-code-advanced.md) to edit the underlying Mapbox GL style.
{% endhint %}
Update the fill layer to change the fill to a pattern instead of a solid color:
1\) to add the `maphubs:images` section to the `metadata` This defines a small image, in this case an SVG vector icon of a stripe pattern, that will be repeated to create the fill.
2\) to add the `pattern-fill` to the `paint` section with the name of the image you created above
```javascript
{
"id": "polygon-stripes-example",
"type": "fill",
"metadata": {
"maphubs:layer_id": 1,
"maphubs:globalid": "abc123",
"maphubs:interactive": true,
"maphubs:showBehindBaseMapLabels": false,
"maphubs:images": [
{
"name": "stripes",
"width": 8,
"height": 8,
"svg": ""
}
],
"maphubs:outline-only": false
},
"source": "polygon-stripes-example",
"source-layer": "data",
"filter": [
"in",
"$type",
"Polygon"
],
"paint": {
"fill-pattern": "stripes",
"fill-opacity": 0.7
}
},
```
If you want to change the color or size of the stripes you can change the `stroke` or `stroke-width` in the `path` element of the SVG icon
#### Updating the Legend
After you've set a stripe fill you'll want to update legend. Here is an example showing the stripe pattern from the example above.
```markup
{NAME}
```
If you change the SVG for the image you'll need to base64 encode the SVG and replace the encoded value after `image/svg+xml;base64,` in the legend html. Paste your SVG into a tool like to get the encoded value.
---
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