Hi Futurerave, I’m trying to achieve realistic results too (with loooot of difficulties).
What StephaBon said, seems right: that viewport message reports the needs of rebuilding the light, can you post new screenshots with the light rebuilt?.
One thing that it’s lot importat (one of the most) are shadows, your scene (all shots) lacks completely of shadows (except for the ones created from the directional light…generally this is due to the excessive injection of light into the scene.
I found, but I tested only in one scene so it needs to be confirmed, that stationary light with the option of “use ray traced distance field shadows” gives better results on shadows and how ligt diffuses (lights are pointing inward the scene like “realistic interior”, even if they are set as static) but, as I told before, this must be confirmed (maybe depends on the kind of scene).
keep testing with the illumination and post the progress :o
Cheers,
Hope that somenoe more skilled can give some other useful suggestion.