# Raster transparency visualization issues

If your raster data does not display transparency correctly, this is often related to how transparency is handled during compression and styling.

Ellipsis Drive supports different approaches depending on whether your data was processed using lossless or lossy compression.

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#### 1. Lossless compression

If your data uses lossless compression, transparency should be defined in the style configuration.

#### How to set transparency ranges

1. Go to Settings → Styling
2. Open the relevant style
3. Expand Method Options
4. Click Open advanced transparency options
5. Select Add transparency range
6. Define the value range that should be transparent

<figure><img src="/files/x8pqmOrZJI1UBPx9z7jU" alt="" width="301"><figcaption></figcaption></figure>

This allows you to precisely control which pixel values are hidden in the visualisation.

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#### 2. Lossy compression

If your data uses lossy compression, transparency should be defined during upload.

#### How to set transparency values

1. Go to Files
2. Create a timestamp
3. Click Upload raster files
4. Specify the pixel value that should be treated as transparent

<figure><img src="/files/KRqxpA4X7yUDhlNXoqtB" alt="" width="346"><figcaption></figcaption></figure>

{% hint style="info" %}

### Common transparency values

* **0** → often used for black background pixels
* **255** → often used for white background pixels
  {% endhint %}


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