# Light IDs

Any mesh with `vehicle_lightsemissive` shaders will appear always emissive in-game unless light IDs are assigned. Assigning light IDs allow you to make some faces only appear emissive under certain conditions (i.e. headlights on/off). Sollumz makes assigning light IDs easy.

With a headlight object selected, enter `Edit Mode` in `Face Selection` mode and navigate to the `Sollumz Tools > Fragment > Vehicle Light IDs` panel.

<figure><img src="https://content.gitbook.com/content/ehtaz4TEffW4ndJvLWLm/blobs/mPPhjwQySSA796aqVme5/image.png" alt=""><figcaption><p>Sollumz Tools > Fragment > Vehicle Light IDs</p></figcaption></figure>

Select the faces of the left headlight that use the emissive shader, then set its light ID to `headlight_l`.

<div align="left"><figure><img src="https://content.gitbook.com/content/ehtaz4TEffW4ndJvLWLm/blobs/sQiUvZE56N6FCejgJtRw/set_light_id.gif" alt=""><figcaption><p>Setting left headlight light IDs</p></figcaption></figure></div>

Notice now that if you unselect those faces, and select the `headlight_l` light ID, it will select those faces you just assigned.

<div align="left"><figure><img src="https://content.gitbook.com/content/ehtaz4TEffW4ndJvLWLm/blobs/XFiBETTve5QwC8oRLmvc/select_light_id.gif" alt=""><figcaption><p>Selecting light IDs</p></figcaption></figure></div>