ARTFEED — Contemporary Art Intelligence

Interior Design Psychology: Why Most Homes Feel Wrong

architecture-design · 2026-04-29

A Five by Nine video explains how the brain reads rooms like paragraphs, identifying common amateur mistakes that make spaces feel flat. Pushing sofas against walls eliminates depth, while placing furniture at varying altitudes creates visual complexity. Vertical lines from bookcases or textures act as runways for the eye. Mounting curtain rods above window frames expands perceived space. Directional lighting from lamps outperforms uniform overhead fixtures. The video notes that in Seoul, where the author lives, against-the-wall sofas and bright fluorescent lighting are nearly universal, making a Korean version overdue.

Key facts

  • The brain reads a room like a paragraph or painting.
  • Furniture on a single horizontal band (floor to 2.5 ft) flattens space.
  • Placing visual interest at varying altitudes creates perceived expansiveness.
  • Mounting curtain rods above window frames enhances the effect.
  • Vertical lines (bookcases, textures) create visual runways.
  • Pushing sofas against walls eliminates depth; floating furniture leaves a gap.
  • Landscape painters separate foreground, middle ground, and background.
  • Directional lighting from lamps is better than uniform overhead light.

Entities

Institutions

  • Five by Nine
  • Open Culture

Locations

  • Seoul
  • South Korea

Sources