A submarine on the open sea

I made a rendering of a fictional gigantic nuclear submarine out on the open sea. There are two versions, one using PBR, and the other uses unlit. Nomad Sculpt currently does not support water but I use a trick to create realistic water by colouring a plane with a smooth (roughness is 0.0 and metalness is 0.0) blue colour, and then change to refraction by setting surface glossiness and interior roughness to 1.0 and the last step is to apply water normal map. Rendered and made using Xiaomi Redmi Note 12 4G 8 GB RAM

Assets that I use:
Textures: Water 0175 from CADhatch.com
Metal 027 from ambientCG
HDRI: Farm Field (Pure Sky) from Poly Haven