Calculated container fields
I'd like to display jpeg in a container field where the path to the image is calculated. The table contains a field (called 'Ref') with the name (but not the full path) of the file and I have created a calculation field (with a container as the result) with the following calculation:
"/Volumes/PUBLIC/PROJECTS/irons_med/Full set/" & Ref &".jpeg"
I'm pretty sure the path is correct. The field type is 'Calculation' and the calculation result is 'Container', but all that appears in the field is the (centred) text of the image path (which looks right):
I was expecting to see the image.
Obviously I'm doing something wrong, but I can't work out what.