If you use our configuration, you'd know what to do with Reconstruction parameters in Light Sache . We describe in detail this point in our lessons. As well as responsible for what value Multipass in Irradiance Map and how it really "influences" on rendering speed.
In addition, you use not true Gamma value in your scene, you just have to highlight the dark places light sources. I advise you to read the lesson about using gamma 2.2 . It described in detail the error.
As for the noise in the shadows, then 30 subdivs for spherical lights, - it is very small. A minimum of 60 to a peaceful shade. As for the density (black) shades, it is again a question of scale.
I have no idea exactly how and where you are light sources. They may overlap geometry. This is so the same may be the cause of the noise in the shadows when rendering in-Ray the V .
With regard to the layer-pass Lighting, I can only guess what you mean😁
It is better to explain everything in your own words, it will be clear what exactly you want skzat😉
What's on your render, are not related to GI. Yes, and render settings. Your shadow noise due to incorrect installation and configuration of the light sources.
Disable them all. Leave only the main. Where did you get it? The lamp? That disables all but him and see what happens. Will the noise. If so, then the matter in it. Check it at the intersection with the geometry, increases sabdivs etc. If not, then, one by one, the remaining plug. The only way you can find the problem.
As for scale, is not discussed. If it is set up correctly, and the same is true set of color mepping , no vytsyevshih renderings will not. Otherwise, what are you missing something, check out until you find a discrepancy with our recommendations.
With regard to the Render the Elements , the "do not go into the jungle," they do not need .
No laytpassov. Customizable light😉