# Lumen Decor Studio: how sunlight changes the color of a room

> An interior visualization with screen-space global illumination and reflections in WebGPU and TSL, showing how sunlight changes color perception.

Canonical page: https://andersonmancini.dev/blog/lumen-decor-studio-1-ssgi

Published: 2026-08-15 · 1 min read · Tags: webgpu, tsl, ssgi, react-three-fiber, launch

Interior design is mostly a conversation about light. The same paint looks different in the morning and in the evening, and the color of the floor bounces onto the wall. Lumen Decor Studio shows what that looks like when you have **real-time global illumination** in a browser.

![A room lit by SSGI in Lumen Decor Studio](https://andersonmancini.dev/images/thumbs/lumen_studio_1.webp)

## What it shows

It uses **Screen Space Global Illumination (SSGI)** and **Screen Space Reflections (SSR)** with Three.js WebGPU, TSL and React Three Fiber. It demonstrates how sunlight can influence color perception and interior design decisions, something that is only achievable with real-time global illumination.

## An honest note

SSGI is still experimental, so performance or rendering issues may occur at higher resolutions. I would rather say that than hide it.

## Videos

The project grew over several videos: the [color selection configurator](https://andersonmancini.dev/videos/lumen-decor-studio-color-selection-new-3d-configurator.md), the [3D configurator](https://andersonmancini.dev/videos/lumen-decor-studio-3d-configurator-threejs-webgpu-tsl-ssgi.md) and the [custom sun controls](https://andersonmancini.dev/videos/threejs-webgpu-custom-sun-controls-for-lumen-decor-studio.md). The next one is [Lumen Decor Studio 2](https://andersonmancini.dev/projects/webgpu-decoration.md).

## Try it

The demo is live at [lumen-decor-studio.vercel.app](https://lumen-decor-studio.vercel.app/), and the details are on the [project page](https://andersonmancini.dev/projects/lumen-decor-studio-1.md).

## Related projects

- [Lumen Decor Studio 1](https://andersonmancini.dev/projects/lumen-decor-studio-1.md) — SSGI interior visualization with WebGPU