Documentation
Learn how Ralpha turns references into photorealistic 3D scenes.
What is Ralpha?
Ralpha is an AI-powered scene generation platform that transforms reference images, videos, text descriptions, and floor plans into fully-rendered 3D environments using Unreal Engine 5. Upload a reference and our AI will decompose it into buildable elements, then iteratively refine the scene until it matches.
Whether you're a game developer, architect, filmmaker, or creative professional, Ralpha helps you visualize concepts faster than ever before.
How It Works
Upload Your Reference
Upload an image, video, floor plan, or describe a scene in text. You can also browse world presets as starting points.
AI Analysis
Gemini Vision decomposes your reference into buildable elements — camera, lighting, atmosphere, terrain, vegetation, structures, and props — each tagged with the right UE5 system to create it.
Iterative Scene Generation
Specialist AI agents control Unreal Engine 5 through 2,700+ MCP commands — adjusting sun position, cloud coverage, fog density, water waves, camera lens, and more. Each iteration captures a screenshot, scores it against your reference, and refines.
Download & Use
Download high-resolution renders or export the UE5 project (UAsset, FBX, or glTF) to continue working in your own pipeline.
Supported Input Types
Images
JPG, PNG, WebP. Upload concept art, photographs, or AI-generated images. EXIF data is extracted for camera and location metadata.
Videos
MP4, MOV. Scene-change detection extracts the most representative keyframes using ffmpeg, then each frame is analyzed for atmosphere matching.
Text & Stories
Describe a scene or tell a story. The AI interprets mood, time of day, and location to build the environment from scratch.
Floor Plans
Upload architectural floor plans. Walls, rooms, and openings are detected and converted into a 3D interior layout.
Platform Capabilities
2,700+ Assets
Built-in catalogue with Paris, nature, furniture, vehicles, and more — searchable and instantly spawnable.
Geolocation & Cesium
Drop a pin anywhere on Earth. Cesium 3D tiles stream real-world geometry as the base layer.
MetaHuman Characters
Spawn photorealistic humans with expression control, lip sync, gaze, and demographic customization.
Physical Sky & Atmosphere
SkyAtmosphere, volumetric clouds, exponential fog, and physics-based sun positioning from lat/lon/time.
Ocean & Water
UE5 Water Body with Gerstner waves, foam, caustics, and tidal height from NOAA data.
Volumetric Clouds
Cirrus, cumulus, stratus, and storm presets. Full control over coverage, density, altitude, and extinction.
Key Features
Real-Time Progress
Watch your scene evolve with a live dashboard showing iteration screenshots, scores, and parameter changes.
GPU-Powered Rendering
RTX rendering with path tracing, Lumen GI, and Nanite mesh virtualization for photorealistic results.
Iterative Refinement
AI specialists score each iteration against your reference and adjust parameters until convergence.
Export Options
Download renders as images, or export the scene as UAsset, FBX, or glTF for use in your own engine.
Tips for Best Results
- •Sky scenes, sunsets, and ocean views are the fastest — often under 10 iterations using only built-in UE5 systems.
- •Higher-resolution reference images give the AI more detail to match lighting gradients and texture.
- •Use style parameters (--time golden, --cinematic 80, --lens wide) to fine-tune atmosphere and camera.
- •For real-world locations, drop a pin on the map — Cesium tiles provide the geometry while AI replaces sky, water, and vegetation with living UE5 equivalents.
- •Complex scenes with characters and architecture benefit from the 2,700+ built-in asset catalogue.
Need Help?
If you have questions or run into issues, contact us at support@ralpha.io