unreal-lumen

# Unreal Lumen Skill Lumen global illumination and reflections for Unreal Engine. ## Overview This skill provides capabilities for implementing Lumen dynamic global illumination and reflections in Unreal Engine. ## Capabilities ### Global Illumination - Configure Lumen GI settings - Handle final gather - Manage infinite bounces - Optimize trace settings ### Reflections - Configure reflection method - Handle screen traces - Manage reflection captures - Optimize quality settings ### Integration - Combine with Nanite - Handle emissive materials - Manage sky light - Configure exposure ### Performance - Hardware ray tracing option - Software ray tracing fallback - Scene complexity handling - Platform scalability ## Prerequisites - Unreal Engine 5.0+ - Modern GPU (RTX for HW RT) ## Usage Patterns ### Project Settings ``` Lumen Global Illumination: - Enable in Project Settings - Configure final gather quality - Set trace distance - Configure scene detail ``` ### Post Process Volume ``` 1. Add Post Process Volume 2. Enable Infinite Extent 3. Configure Lumen settings 4. Adjust quality per area ``` ## Best Practices 1. Use emissive for small lights 2. Keep scenes well-lit 3. Avoid very dark areas 4. Profile with Lumen visualizations 5. Test SW and HW ray tracing ## References - [Lumen Documentation](https://docs.unrealengine.com/5.0/en-US/lumen-global-illumination-and-reflections-in-unreal-engine/)