@Deathrey - Nice work so far. A few crits though. The little statues are a under detailed for how the concept looks. For example you should be getting the face in there. The symbol you have there is looking a little thin + a little too hand drawn. For something like that I would be doing a vector graphic for a emissive…
Cascade is very similar to UDK's cascade (at least right now). Here's a tutorial I made last year for making rain in UDK. I'm planning on making a new one soon, but for now this might do the trick for you. You can now achieve far more realistic water effects due to pbr in UE4 so I should probably remake the tutorial here…