> 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/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="/files/aQHOPQc8aqfP13kq5vmz" 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.

<div><figure><img src="/files/qvr6Gih8vk6spSih389Z" alt=""><figcaption><p>Android Platform</p></figcaption></figure> <figure><img src="/files/oOmSYNLYZQSdusOjCf7v" alt=""><figcaption><p>iOS Platform</p></figcaption></figure></div>

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="/files/p8bbgJWz7zrDKLYK0zLt" 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.