Rule of Thirds
Composition

Rule of Thirds

A compositional guideline that divides an image into nine equal parts using two horizontal and two vertical lines.

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What is Rule of Thirds?

The rule of thirds is a fundamental compositional principle in photography that divides the frame into nine equal segments using two equally-spaced horizontal lines and two equally-spaced vertical lines. According to this guideline, important compositional elements should be placed along these lines or at their intersections (power points), rather than at the center of the frame. This creates more tension, energy, and interest than simply centering the subject. The rule helps photographers create balanced, dynamic compositions with a natural visual flow. While it's called a 'rule,' it's really more of a guideline that can be effectively broken once understood. The technique works across all photographic genres, from landscapes (placing the horizon on the upper or lower third line) to portraits (positioning eyes or the face at intersection points).

AI Prompting Tips

For AI-generated images with rule of thirds composition, include phrases like 'composed using rule of thirds', 'subject positioned at intersection points', or 'horizon on the lower third line'. Be specific about placement, such as 'main subject at the upper right intersection point' or 'key elements aligned along left vertical third line'. For landscapes, try 'horizon placed on upper third with foreground interest in lower portion'. The most effective rule of thirds prompts specify both what elements should be placed on the third lines and what should be at the intersection points.

Example Prompts

"Portrait of a woman with beautiful bokeh background, soft evening light, professional photography"

"Street scene at night with rule of thirds effect, urban environment, neon lights, cinematic"

Related Terms

Quick Reference

Category

Composition

Common Uses

LandscapesPortraitsArchitecture

Key AI Prompt Words

rule of thirdscomposition

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