# VFX

The **FPS Animation Pack** relies on a single Niagara System, which is responsible for the effect of the empty casing when firing:

<figure><img src="https://2660568893-files.gitbook.io/~/files/v0/b/gitbook-x-prod.appspot.com/o/spaces%2FpgcxPqI5xJzfp2msnT5S%2Fuploads%2FHFuzYuiQ9ZFF01bAvJi0%2Fimage.png?alt=media&#x26;token=f141b46d-6ebd-4cad-811e-c9caf91abcc1" alt="" width="563"><figcaption><p>Niagara settings.</p></figcaption></figure>

There are [#casing-particle-settings](https://kinemation.gitbook.io/fps-animation-pack-unreal/types#casing-particle-settings "mention") for different weapon types, depending on the caliber. The actual effect is spawned via the **AnimNotify\_SpawnCasing**:

<figure><img src="https://2660568893-files.gitbook.io/~/files/v0/b/gitbook-x-prod.appspot.com/o/spaces%2FpgcxPqI5xJzfp2msnT5S%2Fuploads%2FheeX111PtB6I1wbgXki5%2Fimage.png?alt=media&#x26;token=bee2857a-c1cf-4fcf-9e4b-badd363f9676" alt="" width="422"><figcaption><p>Spawn Casing notify.</p></figcaption></figure>

{% hint style="success" %}
**Tip**: these notifies are placed in weapons fire animations.
{% endhint %}