Light, Shadow, and Time as Design Tools

Architecture is not only designed with walls, materials, and proportions.It is also designed with light.

In one of our most recent projects, we explored how an element inspired by sundials could be integrated into a contemporary architectural work in Florida. The intention was not to literally reproduce a conventional sundial, but to reinterpret its logic: using the sun’s path as a spatial, visual, and climatic design tool.

The goal was to understand how architecture can register the passage of time through shadow.

To achieve this, we developed a solar simulation using Ladybug Tools in Grasshopper, taking key dates of the year as references: the spring equinox, the summer solstice, the fall equinox, and the winter solstice.

These dates were not chosen randomly. They represent fundamental moments in the sun’s annual behavior: balance, maximum solar altitude, and minimum solar altitude. Through the simulation, we were able to observe how shadow changes in direction, length, and intensity depending on the season.

The Algorithm Behind the Simulation

The process began by obtaining real climate information through EPW Map, selecting the climate file corresponding to Fort Lauderdale Executive Airport.

This EPW file contains environmental data for the site, such as geographic location, temperature, relative humidity, solar radiation, wind, sky cover, and other climate variables. With this information, Ladybug allowed us to generate an accurate reading of the sun’s behavior within the specific context of the project.

Within the Grasshopper algorithm, three main elements were connected:

1. EPW climate file

Used to obtain the exact location and environmental information of the site.

2. Ladybug SunPath component

Based on the location, the project’s north orientation, and a specific date, the solar position was generated.

3. Month, day, and hour sliders

These allowed us to dynamically control the simulation and study specific moments of the year.

Thanks to this workflow, we were not working with a generic idea of the sun. We were working with real site data.

The simulation allowed us to observe how shadow moves across the architecture, how it changes throughout the day, and how it transforms between seasons. Each shadow becomes a temporal mark. Each change in light reveals a different condition of the project.

Due to the physical limitations of the space, a complete or conventional sundial was not represented. Instead, specific moments of the solar calendar were selected to build a more contained, precise, and architectural experience.

This decision allowed us to transform an ancestral reference into a contemporary design tool.

The algorithm was not only intended to represent the sun’s path, but to translate real climate data into a visible spatial experience.

When Shadow Becomes Design

The result was a dynamic reading of space.

It was not simply about seeing “where the shadow falls,” but about understanding how the building can establish a dialogue with the sun. Natural light stops being a passive condition and becomes an active part of the project.

In architecture, working with natural light means designing with something that is constantly changing. Light moves, intensifies, softens, and transforms the perception of space throughout the day and throughout the year.

That is why tools like Ladybug and Grasshopper are so valuable: they allow us to make more conscious decisions from the earliest stages of design.

This type of analysis connects technology, climate, and identity.

On one hand, we use advanced digital tools to study solar behavior with precision. On the other, we recover a deeply ancient idea: observing the sky to understand the space we inhabit.

This is where a powerful opportunity emerges for contemporary architecture in Florida: designing buildings that not only respond to the climate, but also make it visible.

Because when architecture works with the sun, it stops being a static object.

It becomes a living experience.

An architecture that changes with the hour, the season, and the light.