A single-subject aesthetic is an aesthetic that revolves entirely around a single visual, with little or no other visuals on the blog/moodboard. For example, while Cottagecore includes images of pies, animals, flowers, and cottages, Cloudcore is pictures of clouds and cloud depictions such as in illustration and embroidery. Images are often tagged as (the subject)core because it provides an easy way for searching aesthetic pictures of the subject, rather than images that are more plain, memes, i