Hi all,
I’ve released (for free) a small tool that I used internally to better understand Lumen behavior in UE 5.
This is an actor blueprint allowing to create a fully parametric Cornell Box.
A Cornell Box is a common test case to measure the quality of a global illumination and light transport method, such as - in the case of Unreal Engine 5 - Lumen, Path Tracing, and Static Lighting.
The blueprint provides various attributes to customize boxes dimensions, lighting system (Rect Light, Emissive Surface, Reflected Light, and Directional Light), materials/colors, and so on. The purpose of this tool is mainly to analyze and understand Lumen and Path Tracing behavior, such as color “bleeding” effects or simply reflections, in a tightly controlled environment.
Project on Github (with docs):
Feel free to play with it !
Cheers