> For the complete documentation index, see [llms.txt](https://docs.lightact.com/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://docs.lightact.com/projection-mapping/iris.md).

# Iris

Iris is LightAct’s computer vision technology. It consists of one or several *Power over Ethernet* machine vision cameras that have been pre-calibrated by LightAct. You can use Iris to calibrate your projectors faster and much more accurately.

The general workflow is this**:**

### Optional step: IrisVirtual

{% content-ref url="/pages/T7V6TJp9dDyLPrsUgXrz" %}
[IrisVirtual](/projection-mapping/iris/irisvirtual.md)
{% endcontent-ref %}

Before purchasing Iris cameras, you can run **IrisVirtual**. IrisVirtual allows you to determine the number of Iris cameras you will need for your project as well as their location, rotation and lens type.

### Step 1: Setting up Iris Device Node

{% content-ref url="/pages/PMBuIwrwg1sA4Nvhx2j9" %}
[Setting up Iris Device Node](/projection-mapping/iris/setting-up-iris-device-node.md)
{% endcontent-ref %}

Once you have purchased your Iris cameras and have them connected to the network, you need to create **Iris device** node and connect it with the physical Iris camera on the network. Repeat this process if you have several cameras on the network.

### Step 3: Adjusting Focus

{% content-ref url="/pages/Mt2W3QTM0aqI5Q466M2m" %}
[Adjusting Focus](/projection-mapping/iris/adjusting-focus.md)
{% endcontent-ref %}

Make sure all the cameras have a clear and sharp view of projection object. **Adjust the focus ring** on the cameras if necessary and parameters of the Iris device nodes.

### Step 4: Adding and Calibrating Iris Camera in Viewport

{% content-ref url="/pages/rr8YEiOlg97yVHg2s8M2" %}
[Adding and manually calibrating Iris camera](/projection-mapping/iris/adding-and-calibrating-iris-camera.md)
{% endcontent-ref %}

Create **Iris camera in the viewport** and map it with the Iris device node you created in step 1. Map the 3D models of your projection objects to Iris camera(s).

### Step 5: Calibrate Projectors

{% content-ref url="/pages/7qX4hPbo7gZR8nN3vewX" %}
[Calibrating projectors using Iris](/projection-mapping/iris/calibrating-projectors-using-iris.md)
{% endcontent-ref %}

Once the camera is calibrated, you can use it to calibrate all the projectors.