UE5 Lumen [Global Illumination and Reflection] | Unreal Engine 5

This video showcases Lumen, the new lighting system in Unreal Engine 5.

Lumen is Unreal Engine 5's new fully dynamic global illumination and reflections system that is designed for next-generation consoles. Lumen is the default global illumination and reflections system in Unreal Engine 5. It renders diffuse interreflection with infinite bounces and indirect specular reflections in large, detailed environments at scales ranging from millimeters to kilometers.

Lumen solves dynamic diffuse indirect lighting. For example, light bouncing diffusely off of a surface picks up the color of that surface and reflects the colored light onto other nearby surfaces; this effect is called color bleeding. Meshes in the scene also block indirect lighting, which also produces indirect shadowing.

Lumen Reflections works similar to Screen Space Reflections but with the quality of planar reflections. It is really high quality accurate reflections but only when the reflected parts are visible in the screen. Otherwise it falls back to a low quality software raytraced reflections.

[Perceivedshift]

Been impressed with GI in UE5, though this reflection is a simple screen space reflection.

[خليلسليمي-ذش]

unreal engine is just amazing epic ! epic games

[jonathanhernandez]

For a 1050 its so very great performace for that gi realtime

[WENDIGONEMAD]

So impressive that I actually just assumed at first you turned on Ray-Tracing.

[jonathanhernandez]

This gi realtime its insane quality very great i hope my rx 580 8gb will be run great for my game

[rmbyfm]

The writing on the wall looks realistic 0:38

[ReaverswordD]

Next step: realtime caustics. That mirror should have been deviate the light coming from the outside

[weok-doing-things]

Also i want someone to test - Lumen for lights and GI, RTX for reflections and refractions - i think this is best way

[spurio]

Those reflections, atleast the parts that look good are screen space NOT any kinda ray tracing. Epic have said reflections are not quite ready yet, look where screen space reflections end and thats the quality so far, not great but for now it fills in where you would have to make cube maps.

[rasel]

imagine playing videogames with ray-tracing reflection and global illumination Lumen.

[MegariskyYT]

Only gripe with UE5 seems to be the TAA that's enabled by default. I haven't downloaded the build yet, but other people's videos seem to have a very noticeable TAA ghosting effect.

[Zumito]

igual, esos reflejos son screenspace, lumen se utiliza de fondo, pero utiliza screenspace cuando sea posible para dar mayor nitidez

[shadowflar]

Struggling to understand what exactly is new about this. SSR that fallbacks to smudgy cubemap reflection beyond screen pixels. UE4 and Unity 5 were bragging with this same exact thing many years ago.

[Diego-rkbq]

Noob question: Lumen requires a RT Hardware compatible to works? Inclusive for reflection?

[weok-doing-things]

have you tried changing voxel resolution settings and settings for final gather quality (like 5, 10 instead of 1) to check how reflections and overall quality changes? xovel resolution is in project settings

[jpdoshi]

After watching this, I felt real world graphics less better than this

[Official_Proxy]

why is it not reflecting the global illumination from outside the window? Seems really offputting imo

[turalmemmedov]

I think something wrong here :/ It souldnt work like this. Lumen should not work in screen space at all :/ I will double check it.

[itstommymate]

This will sound stupid but, would this work on my RX480

[KTPsama]

how come the light on the ground is still there after he blocks the window and the door with mirror