Display image from "Files"/ContentVersion in VisualForce [duplicate]

Question

I'm working on a project where I'll be using VisualForce to render custom PDF service reports. So my page will take in the ID of a Service object (from Field Service Lightning) and populate all the data from there and its related records. One requirement is that we be able to take attached signature images and include them in the report.

I see there are many ways to attach files including "Notes & Attachments" and "Files". We'd prefer to use Files as it's a newer feature set. However I have only managed to do this successfully with Attachments so far. This is my working code that displays all related Attachment images:

<apex:repeat value="{!CKSW_BASE__Service__c.Attachments}" var="att">
    <apex:image url="{!URLFOR($Action.Attachment.Download, att.id)}"
        rendered="{!contains(att.ContentType, "image")}" />
</apex:repeat>

So you can see I grab the entire Attachments related list, I use the global $Action provider to generate a URL for the attachment, and then render it only if it is actually an image.

But what do I do if the image was attached using the Files feature (which I understand has the API name ContentVersion) instead of Attachments? What is the structure of the related lists I can use, if any, and can I fetch the URL using URLFOR rather than hard-coding /sfc/servlet.shepherd/version/download/{id}? I am not finding this to be well-documented.

EDIT: Okay I found the related list... I would have to iterate over CKSW_BASE__Service__c.ContentDocumentLinks and then get the LatestPublishedVersion property to have the ContentVersion ID. But I am stuck on finding a way to use URLFOR with this object.