Widget:ModelViewer

<model-viewer

 src="{$src|escape}" 
 alt="{$alt|escape}"
 {if $width}width="{$width|escape}"{/if}
 {if $height}height="{$height|escape}"{/if}
 {if $autorotate}auto-rotate{/if}
 {if $cameracontrols}camera-controls{/if}
 {if $backgroundcolor}background-color="{$backgroundcolor|escape}"{/if}>

</model-viewer>