@Bugsy : I think the thread you linked covers an enhancement to the light mapper, and to a degree, the effect of dynamic lights through walls, so would be a good entry in the issues tracker if not already there. For now, I am looking for documentation explaining aspects of the engine not likely to change, but we might have a section for 'workaround solutions' depending on if we get more like this one.
PC SPECS: Windows 8.1 Pro 64-bit, Intel Core i7-5930K (PASSMARK:13645), NVIDIA Geforce GTX 980 GPU (PASSMARK:9762) , 32GB RAM