You can show the final custom design images in the order confirmation email content.
From your Shopify admin, go to Settings > Notifications.
Click on “order confirmation” you will be redirected to the email template editor.
On the Email body (HTML) area, find the code which represents item image. By default the code is like the this:
{% if line.image %}
<img src="{{ line | img_url: 'compact_cropped' }}" align="left" width="60" height="60" class="order-list__product-image"/>
{% endif %}
Update the code above to the following code:
{% if line.image %} {% assign cst_idx = shop.metafields.customify.idx %} {% capture link_front %}https://mycustomify.com/widget?show_custom=1&id={{line.properties[cst_idx]}}&shop={{ shop.permanent_domain }}{% endcapture %} {% capture link_back %}https://mycustomify.com/widget?show_custom=1&type=back_full&id={{line.properties[cst_idx]}}&shop={{ shop.permanent_domain }}{% endcapture %} {% if line.properties[cst_idx] %} <img src="{{link_front}}" align="left" width="60" height="60" class="order-list_product-image"/> <br/> {{ 'view customization' | link_to: link_front }}<br/<br/> <img src="{{link_back}}" align="left" width="60" height="60" class="order-listproduct-image" onError="style.display = 'none';"/> <br/> {{ 'view customization' | link_to: link_back }} {% else %} <img src="{{ line | img_url: 'compact_cropped' }}" align="left" width="60" height="60" class="order-list_product-image"/> {% endif %} {% endif %}