Thanks to a new comparison video from the YouTube channel MxBenchmarkPC, the Paris Tech Demo by Scans Factory is put through its paces on an RTX 5080, running side by side in Unreal Engine 5.6 and version 5.4 with hardware Lumen enabled. That way, we get to see what Epic Games has done with the hardware optimization in the latest release. In GPU‑limited scenarios, the upgrade is immediately clear, with frame rates jumping by as much as 25% thanks to better utilization of graphics resources, even if that means the card draws a bit more power to deliver the boost. When the CPU becomes the bottleneck, Unreal Engine 5.6 really pulls ahead, smoothing out frame-time spikes and delivering up to 35% higher throughput compared to the older build. Beyond the raw numbers, the new version also refines Lumen's visuals. Lighting feels more accurate, and reflections appear crisper while maintaining the same level of shadow and ambient occlusion detail that developers expect.

Unreal Engine 5.6 was officially launched earlier this month, just after Epic Games wrapped its Unreal Fest keynote, where it teased many of these improvements. Hardware-accelerated ray tracing enhancements now shift more of the Lumen global illumination workload onto modern GPUs, and a Fast Geometry Streaming plugin makes loading vast, static worlds feel seamless and stutter-free. Animators will appreciate the revamped motion trails interface, which speeds up keyframe adjustments, and new device profiles automatically tune settings to hit target frame rates on consoles and high‑end PCs. To showcase what's possible, Epic teamed up with CD Projekt Red for a The Witcher IV tech demo that runs at a steady 60 FPS with ray tracing fully enabled on the current-gen PlayStation 5 console. If you're curious to dive in, you can download Unreal Engine 5.6 Paris - Fontaine Saint-Michel Tech Demo today and explore it for yourself on your PC.