metaverseDubai/TECHNICAL_BRIEF.md

Technical Brief - Dubai Metaverse

Engine Specifications

Unreal Engine Version

• Version: 5.4 (Required)
• Build: Latest stable release
• Platform: Windows (Primary), Linux (Optional)

Critical Engine Features

Nanite Virtualized Geometry

• Purpose: Enable high-poly geometry without performance penalty
• Usage: Hero assets, primary buildings, architectural details
• Configuration: Enabled globally, per-asset override available
• Requirements: Static meshes only, no skeletal meshes

Lumen Global Illumination

• Purpose: Realistic global illumination and reflections
• Usage: All lighting in the environment
• Configuration:
  • Lumen Global Illumination: Enabled
  • Lumen Reflections: Enabled
  • Hardware Ray Tracing: Optional (for enhanced quality)
• Performance: Target 60-90 FPS with Lumen active

Virtual Shadow Maps

• Purpose: High-quality shadows for large worlds
• Configuration: Enabled, optimized for World Partition
• Resolution: Adaptive based on distance

World Partition

• Purpose: Stream large worlds efficiently
• Configuration:
  • Cell size: 128m x 128m (default)
  • Loading range: Optimized per cell
  • Data layers: Organized by system (buildings, props, lighting)
• Usage: Entire Dubai district

Movie Render Queue

• Purpose: 8K cinematic rendering
• Configuration:
  • Output format: EXR (16-bit)
  • Resolution: 7680x4320 (8K UHD)
  • Anti-aliasing: Temporal AA
  • Additional passes: Motion vectors, depth, normals

Procedural Content Generation (PCG)

• Purpose: Procedural placement of buildings, props, vegetation
• Configuration: Custom PCG graphs for each system
• Usage: Building placement, road props, vegetation, traffic

Chaos Physics

• Purpose: Vehicle simulation
• Configuration: Chaos Vehicle system
• Usage: Dubai supercars (Lamborghini, G-Wagon, Ferrari)

MetaHuman Framework

• Purpose: High-quality NPCs
• Configuration: MetaHuman Creator + MetaHuman Animator
• Usage: 5-10 diverse NPCs with behavior trees

System Requirements

Development Workstation (Minimum)

• CPU: Intel i7-9700K / AMD Ryzen 7 3700X or better
• GPU: NVIDIA RTX 3070 / AMD RX 6800 XT or better (8GB VRAM minimum)
• RAM: 32GB DDR4
• Storage: 500GB SSD (NVMe preferred)
• OS: Windows 10/11 64-bit

Development Workstation (Recommended)

• CPU: Intel i9-12900K / AMD Ryzen 9 5900X or better
• GPU: NVIDIA RTX 4080 / AMD RX 7900 XTX or better (16GB+ VRAM)
• RAM: 64GB DDR4/DDR5
• Storage: 1TB+ NVMe SSD
• OS: Windows 11 64-bit

Target Hardware (End User)

• CPU: Intel i5-10400 / AMD Ryzen 5 3600 or better
• GPU: NVIDIA RTX 3060 / AMD RX 6600 XT or better (6GB VRAM minimum)
• RAM: 16GB DDR4
• Storage: 50GB available space
• OS: Windows 10/11 64-bit

Architecture Overview

Project Structure

DubaiMetaverse.uproject
├── Content/
│   ├── Maps/              # Level maps
│   ├── Assets/            # 3D assets
│   ├── Blueprints/        # Blueprint classes
│   ├── PCG/               # Procedural content graphs
│   ├── Cinematics/        # Sequencer sequences
│   └── Audio/             # Audio assets
├── Config/                # Engine configuration
├── Source/                # C++ source (if needed)
└── Plugins/               # Custom plugins

Core Systems Architecture

1. World System

• World Partition: Manages large world streaming
• Level Streaming: Additional streaming for cinematics
• Data Layers: Organize content by system

2. Rendering System

• Nanite: Virtualized geometry rendering
• Lumen: Global illumination and reflections
• Post-Process: Cinematic color grading and effects
• Movie Render Queue: Offline rendering pipeline

3. Gameplay System

• Player Controller: First/third-person movement
• Interaction System: Base interactable framework
• Vehicle System: Chaos physics vehicles
• NPC System: MetaHuman NPCs with behavior trees

4. Procedural System

• PCG Graphs: Building placement, props, vegetation
• Houdini Integration: Advanced procedural generation
• Spline System: Road networks, traffic paths

5. Audio System

• Ambient Audio: City ambience, vehicle sounds
• Spatial Audio: 3D positioned audio
• Music System: Background music integration

Data Flow

1. Asset Creation → External tools (Blender, Houdini, Substance)
2. Import → Unreal Engine (with validation)
3. Processing → Nanite conversion, material assignment
4. Placement → Manual or procedural (PCG)
5. Optimization → LOD generation, streaming setup
6. Runtime → World Partition streaming, performance optimization

Plugin Requirements

Essential Plugins

1. Procedural Content Generation Framework

   • Built-in plugin
   • Purpose: Procedural asset placement

2. Virtual Production Tools

   • Built-in plugin
   • Purpose: Cinematic tools, camera systems

3. Movie Render Queue

   • Built-in plugin
   • Purpose: 8K cinematic rendering

4. OpenXR (Optional)

   • Built-in plugin
   • Purpose: VR support

External Tools Integration

• Houdini Engine: For Houdini Digital Assets (HDAs)
• Datasmith: For CAD/architectural data import
• RealityCapture: Photogrammetry workflow

Performance Targets

Frame Rate Targets

• Desktop (1440p): 60-90 FPS
• Desktop (4K): 60 FPS (minimum)
• Cinematic Rendering: Offline (no FPS target)
• VR (if implemented): 90 FPS

Memory Targets

• GPU Memory: <12GB VRAM usage
• System RAM: <16GB usage
• Streaming Budget: Optimized per World Partition cell

Optimization Strategies

1. Nanite: Use for all static geometry where possible
2. LOD System: Traditional LODs for non-Nanite assets
3. World Partition: Efficient streaming based on distance
4. Material Optimization: Shared materials, texture streaming
5. Lighting Optimization: Lumen quality settings, shadow optimization

Asset Specifications

Texture Standards

• Hero Assets: 8K (8192x8192) - UDIM workflow
• Primary Buildings: 4K (4096x4096)
• Background Assets: 2K (2048x2048)
• Props: 1K-2K depending on size
• Format: BC7 (DXT5) for color, BC5 for normals

Geometry Standards

• Hero Assets: High-poly (Nanite), no traditional LODs needed
• Primary Buildings: Optimized geometry, LOD0-3
• Background: Simplified geometry, LOD0-2
• Format: FBX or direct import from DCC tools

Material Standards

• Workflow: PBR (Physically Based Rendering)
• Texture Sets: Base Color, Normal, Roughness, Metallic, AO
• Additional Maps: Emissive, Height (where needed)
• Shader Complexity: Optimized for performance

Version Control

Git LFS Configuration

• Large Files: All .uasset, .umap, texture files
• Binary Files: Models, audio files
• Repository Size: Expected 50-100GB+ with LFS

Alternative: Perforce

• Helix Core: Professional version control
• Streams: Main, Development, Feature branches
• Changelists: Organized by task/feature

Build Configuration

Development Build

• Configuration: Development Editor
• Target Platform: Windows
• Packaging: Not required for development

Shipping Build

• Configuration: Shipping
• Packaging: Windows executable
• Optimization: Full optimization, no debug symbols
• Size Target: <50GB packaged build

Cloud Streaming Build

• Configuration: Development or Shipping
• Pixel Streaming: Enabled
• Web Server: Required for streaming setup

Testing Strategy

Performance Testing

• Profiling: Unreal Insights, GPU profiling
• Metrics: Frame time, draw calls, memory usage
• Targets: Meet all performance targets

Functional Testing

• Systems: All gameplay systems functional
• Interactions: All interactions work as designed
• Visual: No visual artifacts, proper lighting

Compatibility Testing

• Hardware: Test on minimum and recommended specs
• Drivers: Latest GPU drivers
• OS: Windows 10/11 compatibility

Documentation Requirements

• Technical Documentation: All systems documented
• Asset Documentation: Asset specifications and usage
• Pipeline Documentation: Workflow documentation
• API Documentation: Blueprint/C++ API documentation (if applicable)

Security Considerations

• API Keys: ChatGPT API keys stored securely (not in repository)
• Asset Security: Proprietary assets protected
• Build Security: No sensitive data in builds

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Version: 1.0 Last Updated: [Current Date]