I sorta want to make a 60fps version, maybe at half speed. But that would mean 4x the frames as this one, and I'm not ready to devote 6 hours of render time to this.
Playing with the water transparency revealed a bug in the CPU rendering of surfaces inside transparent materials.
Fixed in #Avoyd beta 0.21.0.871 https://www.enkisoftware.com/products
Thanks everyone for your feedback. Most answers congregated around an Absorption Length = 8 so we'll change the default Minecraft water and flowing_water to that in the next full release of Avoyd.