Well that’s some really interesting info! Thanks for correcting me with new knowledge. I did some image searches with red, green and blue laser to see this effect. Even though I don’t know if their wavelengths overlap two color-sensors in the camera used, it would never be able to overlap all 3 sensors. And it does indeed seems like the source is getting white. However, it does seems like every image where I find this effect, the white is only visible in the source where the light intensity is extremely high relative to the secondary light rays. But in Unreal, the white color appears on a very low light intensity as well. Is this something to do with the light attenuation to do perhaps? Is an omni light in Unreal following the inverse square law, or is this tweaked for performance reasons?