> For the complete documentation index, see [llms.txt](https://pubscale.gitbook.io/immersive-ads-sdk/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://pubscale.gitbook.io/immersive-ads-sdk/v1.3.1-1/integration/scene-setup.md).

# Scene setup

**1. Configure PubScaleManager prefab**

Drag and drop the PubScaleManager prefab from **Assets/PubscaleSDK/Common/Prefabs/PubScaleManager.prefab** in the first scene in your Build Settings.

#### 2. Drag and Drop Native Ad Unit prefab

Drag and drop any of the Native ad unit prefab from the path Assets > PubScaleSDK > NativeAds > Prefabs > AdHolderUnits into your gameplay scene.

{% hint style="info" %}
If using any prefab from the “ScreenSpaceCamera” folder then put it under any Canvas in **Screen Space-Camera** render mode to see ads on it.
{% endhint %}

#### 3. Configuring Default Ad Unit

Open the Settings Tab in the PubScale Main Menu found under **Window > PubScale SDK > Main** and Enter the Native Ads settings. Add Native Ad IDs in the Fallback Native ID field.

<figure><img src="https://3460757206-files.gitbook.io/~/files/v0/b/gitbook-x-prod.appspot.com/o/spaces%2FdDFty5Cpf2O9BkKp06L1%2Fuploads%2FrQ07ElwA3un43K8mALVU%2FFallbackID.gif?alt=media&amp;token=2306252d-7527-4315-bb82-316ae526ed39" alt=""><figcaption><p>Android Native ads settings</p></figcaption></figure>

Adding Native Ad IDs in the Fallback Native ID field will ensure ads are requested in case there is a network delay in receiving the dynamic ad config file from the server.

4. **Assign Unique Ad Tag for Ad Units**

Ensure each ad unit has a unique Ad Tag assigned. Example: Home\_Screen\_Unit or level\_fail\_ad\_unit. This allows us to analyze the performance of each ad unit for further optimization.

<figure><img src="https://3460757206-files.gitbook.io/~/files/v0/b/gitbook-x-prod.appspot.com/o/spaces%2FdDFty5Cpf2O9BkKp06L1%2Fuploads%2F8CbTVefaZDgmvZwXCXdh%2FAdTag.png?alt=media&amp;token=ad010f2c-a194-4734-b7d0-a378782f3d05" alt=""><figcaption></figcaption></figure>

We have now completed setting up the ads. Let's proceed to the next step to learn how to test the ads.