A bit complicated for me to grasp that concept at the moment, but i bookmarked this topic, so i come back at it later for sure :]
BTW, in your strawberry tutorial you used IOR at value 1.0 or just slightly above. Wouldn't be more physically correct to use higher IOR, like close to fresnel IOR values? Did you do that for performance reasons or there's something else?
Nope, i just did not find higher IOR values looking right. But i knew nothing has 1.0 IOR, so i tried to add at least some.
When i observed real strawberry, i found out that light doesn't bend and refracts inside that much, but at the same time, i did find that using translucency only made strawberries look too solid and not watery and juicy enough. So i added some refraction to the mix, yet i found out that when i increased refraction IOR, light bending was too significant and did not look like the real strawberry i was looking at :) So the only way to have still somewhat not completely solid, but also not oddly refractive strawberry was to use unrealistically low IOR :)
Amazing strawberry tutorials.
I`m still trying to figure out exactly the SSS but I think I`ll get there.
What about a strawberry cut in half with a texture mapping it, I`m trying to make it work but I`m not sure where to use the diffuse texture. Any idea?