Reframing Space: How Marble Is Transforming Architectural and Interior Visualization

Overview

For decades, architectural visualization has followed the same trajectory — from sketch, to render, to animation. Even with advances in real-time rendering and AI-assisted design, most tools still produce flat representations of space. Designers imagine in 3D but work in 2D.

Marble, World Labs’ spatial generation engine, is changing that balance. By transforming images and text prompts into explorable 3D worlds, it enables architects and designers to step inside their own concepts, testing light, volume, and atmosphere as easily as they adjust a material or camera angle.

This shift marks a quiet revolution in design visualization — one where world generation becomes a core part of architectural ideation. With early collaborators such as Fenestra and Interior AI, Marble is showing how AI-driven spatial tools can accelerate not just visualization, but the act of design itself.

A New Spatial Paradigm for Design

In traditional architectural workflows, each stage — sketching, modeling, rendering — is siloed. Designers rely on static visuals to express dynamic ideas. Generative AI tools have made image creation instantaneous, but the results still lack depth, scale, and movement.

Marble changes that by fusing generative intelligence with spatial reconstruction. A designer can take a concept image, feed it into Marble, and receive an explorable, realistic 3D scene within minutes. These worlds are not game levels or abstract simulations — they retain the material logic, perspective, and tone of the designer’s intent.

For architects, this means being able to:

• Walk through a concept before drafting a floor plan.
• Explore light and proportion dynamically, not through static renders.
• Share interactive environments with clients and collaborators remotely.

In effect, Marble turns the rendering phase into an experience phase, where ideation and immersion happen together.

Fenestra: Redefining the Design Loop

Among the first architectural platforms to integrate Marble is Fenestra, a web-based tool that merges generative AI with spatial design workflows. Built for architects and interior designers, Fenestra allows users to move seamlessly between sketches, generated imagery, and 3D visualization in a unified workspace.

By connecting directly with the Marble API, Fenestra gives designers the ability to transform early visual ideas into immersive environments instantly. A designer can start from a sketch, material board, or 3D model — and in seconds, Marble generates a full Gaussian Splat world to explore inside the same workspace.

Fenestra’s Infinite Canvas interface is key to this workflow. Built with React Three Fiber and SparkJS, it acts as a live design space where images, sketches, videos, and Marble-generated environments coexist. Designers can arrange ideas spatially, linking visual prompts to immersive scenes that evolve alongside their concepts.

The Power of Seamless Integration

Technically, Marble fit naturally within Fenestra’s architecture. Both tools are fully web-based and optimized for real-time Gaussian Splat rendering through SparkJS.

• When a user submits an image or text prompt in Fenestra, the Marble API reconstructs it into a navigable 3D environment.
• The scene is streamed directly back into the same workspace, allowing designers to explore or iterate without switching software.
• Spatial and 2D elements coexist — generated images, moodboards, and models all feeding the same creative loop.

This integration reduces the time between concept and visualization from hours or days to minutes, while maintaining fidelity and realism. It also makes advanced visualization accessible from any device — no local rendering farms, no heavy software installs.

Interior AI: Spatial Design for Everyone

While Fenestra focuses on professional workflows, Interior AI demonstrates how Marble can democratize spatial visualization for anyone.

Interior AI became the first consumer-facing app to integrate World Labs’ experimental world model, allowing users to redesign a room with AI and then instantly walk through it in 3D.

A homeowner can take a photo of their living room, select a new style or layout, and generate a realistic reimagining — not as a flat render, but as an explorable space.

This use case hints at how Marble's spatial capabilities can scale beyond professional design into everyday creativity. It shows a future where interior visualization is interactive by default, where anyone can see, navigate, and feel a design idea before committing to it.

Results & Impact

Together, these collaborations illustrate how Marble is reshaping the role of visualization in architecture and interior design:

• Speed & Iteration – What once required complex modeling or rendering now happens in seconds, freeing designers to explore more ideas.
• Immersive Communication – Clients and collaborators can experience projects firsthand, improving understanding and engagement.
• Workflow Unification – The gap between ideation, visualization, and presentation collapses into a single process.
• Accessibility – Because Marble scenes are web-native, they work across devices and platforms — expanding access to high-quality visualization.

For Fenestra’s users, this means turning iterative design into an interactive dialogue — adjusting ideas live within spatial environments.
For Interior AI’s users, it means seeing and walking through design ideas without any technical knowledge at all.

A Glimpse of What’s Next

Both Fenestra and World Labs are already expanding the capabilities of spatial design through Marble’s API and SparkJS renderer.

The next step is fully interconnected design canvases — node-based systems where designers can link generated images, videos, and worlds into a continuous creative ecosystem. Fenestra’s upcoming Infinite Canvas exemplifies this approach, merging architectural planning, visual exploration, and immersive presentation within one space.

Meanwhile, Interior AI continues to refine its generative home design tools, combining Marble’s 3D world modeling with real-time editing and virtual staging.

Across both platforms, the underlying idea is the same:

Design should be spatial from the start — not an end product of modeling, but a natural part of imagination itself.

Conclusion

What started as an experiment in spatial generation has become a new foundation for design visualization. Marble’s ability to generate realistic, explorable worlds from 2D inputs is unlocking a new era for architects, interior designers, and creative platforms alike.

Where once designers waited for renders, they now explore spaces in real time.
Where clients saw static images, they now walk through immersive worlds.

Fenestra shows how this technology elevates professional workflows — connecting ideation and experience within a single environment.
Interior AI proves it can reach anyone with a camera and a curiosity for what their world could become.

Together, they demonstrate how Marble is transforming visualization from a representational tool into a living medium for design thinking — turning imagination into inhabitable reality.