[Theme Minimatica] Help linking posts to another post?

Okay so here’s the idea,

I’ve got a bunch of different categories (all photography related eg. portraits, landscape, musicians, etc)that show up in the slider when you select them. So say I click on “portraits”. A slider comes up with all of the different portraits posts, each one is an individually clickable image, and once you click on the image it takes you to that image’s post (where people can add comments and what not).

What I want to do is have all of these “clickable images” lead to one, unanimous post and in this post I would have all of the images for that said category (in this example, they would all be Portraits). So it would be like no matter which image you click on, you get a gallery of sorts where you can see all of the images in that category. I suppose I could make all of the posts exactly the same, but then this becomes a pain when I want to add or remove images.

Does anyone have any idea how this could be done?

Sorry if this seems super confusing.