One hypothesis I've been kicking around: human brains like detail.
I thought of this on a walk down a (sub)urban city street.
- High detail: I first noticed the variety of plants in just the garden strips between the sidewalk and the street. I was trying to count how many there were, and I quickly lost track. Then I started looking at each individual plant, and the amount of detail is wild---the sheer intricacy and variation in all the parts and stages of growth. Not to mention the colors (OK, and smell and movement).
Then, I looked at the human made objects around me:
- Low detail: Flat concrete road. Flat concrete sidewalk. Flat stairs. All from rectangular tiles. Metal pole handrail.
The houses around weren't much better---boxy shapes, low ornamentation.
While I think it's generally accepted that nature is more pleasing to the senses to be around human-created objects, it made me wonder whether amount of detail is a fundamental aspect of what our brains enjoy.
This rumination gets activated whenever I walk by old ornate buildings or read an article like this.
Relatedly, even low-poly games people find beautiful (Tunic comes to mind) have an extraordinary amount of detail when you dissect the textures and postprocessing effects. I'd share a video but I'm way off track now.