# Multi Material

The **MultiID** operator lets you assign different materials on a single mesh. This works by associating mesh faces to different “IDs” or “groups”. You can set up your model’s **MultiID** values in another software or add a **Material IDs** operator in the model asset.

To use this feature apply a material with a **MultiID** operator to a model that has been setup with material id values. Then the corresponding **Material ID Asset** of the **MultiID** operator is applied to the model asset.

<table data-header-hidden><thead><tr><th width="177"></th><th></th></tr></thead><tbody><tr><td><strong>Default Color</strong></td><td>Defines the default color when no material asset is assigned to the Material ID group. We use a color picker that can use RGB, HSV or HEX inputs.</td></tr><tr><td><strong>Material ID 0 - Material ID 29</strong></td><td>This is where a user applies which material asset is applied to the corresponding <strong>Material ID</strong> number. You need a model asset with Material IDs in order for this to work correctly.</td></tr><tr><td><strong>Is MultiID</strong></td><td><strong>MultiID</strong> when checked enables having multiple materials on a single mesh.</td></tr></tbody></table>

{% hint style="info" %}
Avoid using MultiID Materials, as they can have a serious impact on performance depending on the mesh density
{% endhint %}