Dynamic lighting using emissive materials


I have a so called ‘emitter’ that uses LineTrace to spawn a ‘Lightray’ - now that ray is a pipe like mesh with an emissive material applied to it. I can reflect the ray using some mirrors (game mechanics, irrelevant, but that’d be the main idea of the game).

I have enabled dynamic lighting in the material, got a LPV (LightPropagationVolume), a directional light that injects light into the LPV, and the ray still doesn’t light the surroundings no matter where it’s spawned / reflected.

Is dynamic lighting using LPV broken in 4.21 or what? Any help would be appreciated. Thanks!