Hi,
+1 for marketplace.
I downloaded it and got it to work, and was really amazed about its quality! So I am a noob and feeling like a minion driving a KITT2000 at moment. Still a lot to learn…
However, one thing I found pretty much straight away is the light refraction effect (or “sub surface scatter” it is called here I believe) when under water. Looking from above, all looks fine; part of object above water remains unscattered, and the part below surface gets scattered. But when being under water changes; both parts above and under water get scattered. Scattering however only happens when light passes a medium boundary (water level). So when under water, only the part of object that is above water is scattered. After days struggling finding the right location and method on how to change , I got lost. 
Could someone help me a bit pointing me in the right direction?
Very much appreciated.