Nubcake, thate actually looks wonderful!
Expose more of the map to the water like the first screen (if you havent done so already), because it looks absolutely AMAZING.
Is the church kinda thing accessible? If so, having the stain glass as a patch mesh, which on the outside is stain glass, then add another mesh(orbrush), on the inside which is glass, just an idea. (or get a proper stain glass shader, if its possible

)
For the water exposure comment, im thinking aquarium. (in structure)
really looks mazing nubcake.