Display attachments from related table as images in ArcGIS Pro pop-up

[KateJohnson1]

I'm using a Python script to pull in records as features each day from an API that is being updated by others. Some of these features also have PNG images associated with them, so I have another script that downloads the images and adds them as attachments to the features using a related table.

I need the pop-ups in ArcGIS Pro to display the actual image, not just a thumbnail. I've successfully configured AGOL pop-up to show images using URLs, but haven't done it with related tables in Pro.

Is it possible to configure the pop-ups in an ArcGIS Pro feature class to show the actual PNG image from a related table? How do I go about doing this?

Thanks!

[MichaelVolz]

If you are unable to get this to work, would you be able to store the images on your network and include a field that would allow you to populate an HTML link to the image location?

The way I do this type of workflow requires a web server where you can create a virtual directory to the folder location of the images.

[KateJohnson1]

That's essentially how I've done this in the past. But in those cases, I had a set directory of attachments that didn't change frequently.

In this instance, my Python scripts are set up to run daily and update the related table attachments. 

I was hoping there was just a simple way to configure the pop-ups to view images with local related table attachments, rather than HTMLs.