Yeah I've been following that, but had a little trouble with it on the "Skinny dip" render, so I stuck with shadow catcher on cloth plane. I have to go back to simple tests to aquaint myself with it before putting it through it's paces  I agree it is really cool solution & love your interjections,  no wonder everyone thinks your PC or copy of pose is sprinkled with Fairy Dust :-) we never see a bad render from ya (an old saying..."never let 'em see you sweat"...we know the real truth & how long it takes to make it perfect)

Doesn't the gather node slow down the render & give a bit of noise though? That's what I've noticed when experimenting with it, however I wonder if the HDRI GI would make a difference. Will have to play with that some this weekend.

And speaking of solutions, you & Bagginsbill are on a roll this week

Solution to previewing inside of the "MECDome"

Bagginsbill offered this technique for viewing inside of the sphere in the preview window, which is perfect for placement now... although EF should really address thing like this. Folks like you guys are tidying up after them a lot LOL.  I put his solution into visual form. We need any & all tools to encourage understanding. check it out.