# More Add-Ons Documentation of A-Frame components bundled with the core. ## ar-scan-gimmick Use `ar-scan-gimmick` to display an image in the [HUD](../api/hud.md) while the physical scene is being scanned (i.e., before an image target is tracked). Make sure to add the entity to [ar-hud](../api/plugin-aframe.md#ar-hud). *Example* ```html ``` ### Properties | Property | Description | Default | | -------- | ----------- | ------- | | `opacity` | Opacity value. | `1` | | `src` | URL of an image. If none is provided, a default image is used. | `""` | ## gltf-anim An easy-to-use component for animating 3D models. *Example* ```html ``` ### Properties | Property | Description | Default | | -------- | ----------- | ------- | | `clip` | The name of an animation clip. | `""` | | `loop` | Whether or not the animation should loop. | `true` | | `speed` | Multiplier of the playback speed. | `1` | | `transitionDuration` | Duration, in seconds, of transitions between clips. | `0` |