Specify environment image on Shopify 3D model

product.liquid

{% comment %} Before {% endcomment %}
{{ media | model_viewer_tag: image_size: '1024x', reveal: 'interaction', toggleable: true }}

{% comment %} After {% endcomment %}
{%- assign environment_image = settings.models_environment_image | default: 'neutral' -%}
{{ media | model_viewer_tag: image_size: '1024x', reveal: 'interaction', toggleable: true, environment-image: environment_image }}

settings_schema.json

{
  "name": "3D Models",
  "settings": [
    {
      "label": "Environment image URL",
      "type": "url",
      "id": "models_environment_image",
      "info": "Provide an environment image to set the lighting in the 3D viewer. Image should be in HDR format. If no image URL is provided, the \"neutral\" setting will be used."
    }
  ]
}