EXCELLENT JOB!
Not at all, it took me a moment for sure! Mind you, Vervette's Sandbox has NO layers, which means that I have to do all blending on the canvas,
wet on wet so to say. So, yeah, it took me a moment, too. Let alone thinking about it all carefully.
You've really done a fantastic approach and it looks even more painterly, which I love about it!
But this is just the beginning of a next level of observation for you. To think about the physical events you try to replicate is quite a journey and it's easy to mistake things when merely observing.
Always consider the path of the light, when does it diffuse and where could it reach to, when do things accumulate, when do things get reduced... it's a heavy thinking exercise, probably more so than the observation itself. You only observe to confirm your thoughts.
There's another really important observation about light and surface colors:
Assuming you have a white light, the more of that light hits your surface, the more saturated- or original- your surface color will be. Less light will bring out less of this original color as it mixes with the surrounding bounces. However, internal bounces on the surface, like in crevices or other folding, may intensify the saturation, because only what's left of the light's spectrum continues to illuminate the surface, filtering more and more the color of the light and a fold will allow less of the outside illumination in.
I may paint a little example for you on that, too... we shall see!