If I’m interpreting your schema goals correctly, you’re trying to display a different set of photos with each blog post, including a caption per image.
To do that;
C2, C3, C4 should be one collection “Tasty food images”.
Add a Ref to that collection to point at Item
In your Item Collection Page, you’ll drop a collection list, bound to Tasty food images, which filters them to “Item = Current Item”. That will show only images for the current blog post, along with caption, link, photographer, whatever else you want.
The basic setup I can get through, but a collection list in a collection item? It inside a collection list item is what I am going for, it seems it’s not possible. I think it might be my sketch doesn’t describe it well.
Riiight. Sorry! Thanks for you patience. I got it now, the stumbling block was that I didn’t realise you were saying each photo should reference the article it belongs to. Once I had understood that, then the “Item = Current Item” option was available as a filter.