Oh man, this is going to be sick. Before I thought it was Unity exclusive, but last month, Otoy actually made an announcement that Octane/Brigade will be coming to UE4 next year, with private beta testing having already begun.
https://home.otoy.com/unreal-engine-announcement-siggraph/The Unreal Engine integration on display at SIGGRAPH features:
- Rapid automatic conversion of Unreal Engine scenes and materials into OctaneRender and full integration of OctaneRender features shipping with Octane 2019.1.
- Brigade Engine scene graph (introduced with OctaneRender 4) for real-time path-traced games and interactive content powered by Unreal Engine
- AI Light, AI Scene, AI Spectral and Volumetric Denoising, and Out-of-Core Geometry, UDIM Support and Light Linking for production-ready final rendering
- Octane Vectron and Spectron – fully procedural node-based Volumetric Geometry and Lighting for infinite detail and granular lighting control (introduced in OctaneRender 2018)
- Using OTOY’s ORBX scene format, the current integration supports 20+ of the industry’s leading DCC tools – including Cinema4D, Autodesk Maya, and 3DS Max – enabling artists to easily drag and drop scenes from their favorite authoring tools and mix and match them with Unreal Engine content in a fully responsive Live Viewport.
- OctaneRender 2019 first look – optimized support for NVIDIA RTX Ray Tracing, Vulkan, DXR, CUDA and Metal iOS/Mac OS backends built on OTOY’s cross-platform RNDR framework. AI Viewport: mixed reality media, including upscaling, AI style filters, light field and holographic output for next-generation volumetric displays and HMDs.
You can see off-screen footage of it running at 4K, 60fps.