Semi-useful, if only because it shows how much noise is still hiding in there and where (to better direct your noise reduction efforts).
Hi everyone great tests!!! I have problem with glass surfaces in 2018, I've tried Dielectric as well as BSDF, but always getting same result. When two glass panes in behind other its looks pitch black. Played with background colors same results. I have image backdrop in my sciene. Maybe it's have to do with Shadow Catcher though I ve tryed different settings under the Shading Model tab. Is it a bug?