The attached images are from a default 3rd person shooter raytrace project. The materials of the floor and cubes were changed to the shown colors, NOTHING else was done to lighting or anything else. Lighting is dynamic with Scalability Settings and Material Quality Level at Epic.
Common sense would say that there should be red/yellow light reflected on to both characters, however that isn’t exactly the case. The only surfaces that show are the zippers/buckles on Phase and the mannequin shows some oblique reflections. However, reflections are not necessarily reflected light per se as the expected result is not what I would imagine. Coming from a 40+ year background in photography/videography, this has thrown me for a loop as the expected ambient light reflections simply aren’t there.
Also, I’ve spent 3 weeks researching this, found a handful of forum posts here and on reddit that are similar but none of them had a solution. I understand the various lighting aspects fairly well, have experimented with material parameters, tried the various reflection capture widgets, static lighting, GPU lightmass, etc. but all fail.
All of the documentation, tutorials, forum posts, etc. deal with reflections, not reflected light. And I mean skylight sun based, not point, spot or other but even the other sources of light don’t reflect properly. If you shine a red spotlight onto any surface, it should throw light from the surface based on the surface material/color and then hit anything in the influenced radius of the light throw. As you can see from the attached, the expected return from this scene would be that the semi-glossy material from Phase and the glossy material from the mannequin would have a lot of yellow, such is not the case. The render of the girl with the green plane (from Daz Studio) is exactly what would be expected from such a setup with one key light in front and almost directly above. I also attached one showing the odd holes I’m getting from a spotlight shadow as it may help someone to see what is happening.
Any feedback on this would be greatly appreciated as I’m an old guy and getting wore out trying to troubelshoot this. I’m a retired MS/Apple dev and am proficient in Blender, iClone/Character Creator as well as Daz Studio but nothing makes any sense in UE4 with reflected light.