If you’ve stepped into a new luxury hotel lately, you might have felt it before you noticed it: spaces that flow, walls that curve, ceilings that arch instead of cut. The sharp-edged, boxy aesthetic that defined high-end design for years is giving way to softer shapes, rounder forms and organic materials. Research explains why: curved lines reduce activity in the amygdala, the region in the brain linked to fear and anxiety.
Yes, curves are harder to build. They demand custom materials, specialized techniques and more time on-site. But they also do something straight walls can’t: they positively transform the mood of a space. And luxury hotels have taken note.
The Brain Reads Curves As Safe And Comforting
“Neuroscientific research shows that simply seeing three-dimensional curved lines, such as those found in furniture, has a calming effect and even boosts our creativity,” says renowned environmental design psychologist Dr. Sally Augustin, founder of Design With Science.
This has already been proven to work with two-dimensional wallpaper. She therefore recommends “biophilic designs” to her clients—organic shapes and round patterns that mimic nature.
Examples include unfolding petals or circular flourishes in naturally grained wood.
“Biophilic design essentially means using natural materials as found in nature, including colors and sounds,” she says. This has a particularly calming effect on the psyche and not only makes us feel more comfortable and relaxed, but also improves our cognitive performance.
Studies back this up. When participants walked through virtual rooms designed with either curved or angular features, a computer tracked their brain activities in real time. The curved spaces triggered responses linked to positive emotions and ease, while the angular ones had the opposite effect.
Ingrid Fetell Lee also researches people's preference for curves and rounded shapes. When she was working on her book Joyful, she asked people to name objects that sparked happiness in them.
Turns out, almost everyone mentioned things that had one thing in common: “lollipops, pom-poms and polka dots”—all round in shape.

