Hello, after a small nightmare with switching to new whitewater system I'm a bit stuck with rendering an ocean shot:

I would like to see a structure in water dissapear slowly into the abyss. Because Mantra is quite slow I don't want to use the volumes or a uniform volume shader for that (which is recommended). Absorption/Attenuation would be ok I think but it's missing from the Ocean Surface material! It's mentioned in the manual… What's going on? Any ideas how to switch it on? I've attachned a screenshots, maybe I'm not looking at this correctly.

Extra question - any ideas why Mist shelf tool was removed? We're supposed to build our onw on Pyro, right?