If I remember correctly, the DiffuseBoost controls the amount of diffuse color that's being bounced around(not necessarily strength, so the results will vary depending on the diffuse textures) and if you're using the lightmass setting, then it controls all of the materials. You may want to increase it differently for each…
Yeah I know what you mean about the bounce light, been trying to get some light to bounce around the whole environment by cranking up the diffuseboost settings but it just makes the area around the throne look horribly bright and doesnt do much to the rest of the environment, its like I want to put more power into the…