Generate a highly intricate, large-...

Generate a highly intricate, large-scale Minecraft schematic of an asymmetrical fantasy manor that replicates the primary structural layout seen in the image, but fully reimagined with a surface-level underwater aesthetic. The overall layout must feature the connected main dwelling, sprawling wrap-around porches, and a towering side spire, but now uniquely crowned by a massive, organic nautilus shell structure that rests on the top and dramatically curves down to cover the entire right side of the building. Ensure the interior spaces are logically partitioned and scaled perfectly for functional player interaction and exploration. Maximize spatial profundity by deeply layering the facade, breaking up any flat surfaces by mandating the use of non-full vani