Display list of images in form

Display list of images in form

I have a requirement to attach one or more pictures to a form record. The form view must then show all pictures attached to the form. The images need to show, not the filenames.

At first I thought a subform would be the answer, but I cannot get the pictures in the subform to show, only the filenames. I tried both an upload field and an image field with the same result.

Has anyone done this?