Lumen Tool is a free 3D portrait lighting simulator that runs entirely in your browser. Most alternatives are either expensive desktop software or outdated browser tools that cycle through pre-rendered photos. Lumen renders shadows in real time using Three.js, loads in under a second, and requires no install or account. It's a single HTML file under 1MB. Move a light, watch the shadows shift live. That's it.
Exploring lighting beyond Lumen Tool? Try Womp for playful, pro 3D creation, Celer3D for collaborative, parameterized modeling, and Morflax studio for web-based design. Need outputs fast? Packshot Generator by Colorful turns models into crisp packshots, while Render a House focuses on architecture.