# Selecting Atom Particle vs. Replicator Arr

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### Atom Particle

When the icon with four spheres is selected, it uses the 3D model as the particle type for your scene. It will use this particle to fill up a pre-defined Replicator Shape.

<figure><img src="https://2307539615-files.gitbook.io/~/files/v0/b/gitbook-x-prod.appspot.com/o/spaces%2FVXPIT6wWK7VeTYMAHNYe%2Fuploads%2FPyseIMejG1NMK3o5nHEQ%2Fimage.png?alt=media&#x26;token=c9fd909a-34a7-4de0-a9ff-0ec67b8fdf4d" alt=""><figcaption></figcaption></figure>

### Replicator Array

When the icon with the array of spheres is selected, it uses the 3D model as the structure for the particle array.

<figure><img src="https://2307539615-files.gitbook.io/~/files/v0/b/gitbook-x-prod.appspot.com/o/spaces%2FVXPIT6wWK7VeTYMAHNYe%2Fuploads%2FBodMD48eUdOUpTZuXXbr%2Fimage.png?alt=media&#x26;token=d91089e3-241c-4c34-b79a-373900e9b116" alt=""><figcaption></figcaption></figure>

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**3D Replicator**\
• Using position noise\
• Use 3D object as replicator shape\
• Use Layer alpha as replicator shape\
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[**WATCH NOW!**](https://www.videocopilot.net/help/element/tutorial/basic/3d_replicator/)&#x20;

<table data-view="cards"><thead><tr><th data-hidden data-card-cover data-type="image">Cover image</th><th data-hidden data-card-target data-type="content-ref"></th></tr></thead><tbody><tr><td><a href="https://2307539615-files.gitbook.io/~/files/v0/b/gitbook-x-prod.appspot.com/o/spaces%2FVXPIT6wWK7VeTYMAHNYe%2Fuploads%2FTzOZfT480WDExHNy4Vqd%2F3d_replicator.jpg?alt=media&#x26;token=ec62d838-128a-4b23-83f8-3da3081d3b99">3d_replicator.jpg</a></td><td><a href="https://www.videocopilot.net/help/element/tutorial/basic/3d_replicator/">https://www.videocopilot.net/help/element/tutorial/basic/3d_replicator/</a></td></tr></tbody></table>