Hey @keppn,
Huge thanks for the possible solution.
I've just spent a chunk of time experimenting with SSS, both in Octane and with C4D's default materials, and I was unsuccessful in both cases.
As far as Octane goes, I simply couldn't get the desired result (I will be experimenting a lot more on that front), and as for the default materials, SSS was taking so long to render (even with "Fast evaluation" checked off) that I might as well as be using the inefficient method showcased in VIDEO 003 of my original post. Additionally, I couldn't get a result that came close to what you suggested.
That said, as I am very inexperienced with C4D's SSS, I'll have to dig deeper into ways of speeding it up, but I'm not holding my breath. I still think that Octane's SSS is the way to go if I'm ever able to put your theory into practice.
Either way, I'll be experimenting with the SSS. Thanks again for the help!