tmasterpiece, Best quality at best，If future trains could travel in the sea, their design would likely be significantly different from current train designs. They may have a streamlined and aerodynamic shape to reduce drag and increase speed. They may also have advanced waterproofing and buoyancy systems to allow them to float and move through the water. Additionally, they may have advanced propulsion systems such as hydrofoils or submarines to generate the necessary power to move through the water. The train may also have advanced safety features such as collision avoidance systems and advanced life-saving equipment to ensure the safety of the passengers. However, the exact design of the sea-faring train's exterior would depend on the advancements in technology and the needs of the passengers.

verybadimagenegative_v1.3, ng_deepnegative_v1_75t, (ugly face:0.8),cross-eyed,sketches, (worst quality:2), (low quality:2), (normal quality:2), lowres, normal quality, ((monochrome)), ((grayscale)), skin spots, acnes, skin blemishes, bad anatomy, DeepNegative, facing away, tilted head, {Multiple people}, lowres, bad anatomy, bad hands, text, error, missing fingers, extra digit, fewer digits, cropped, worstquality, low quality, normal quality, jpegartifacts, signature, watermark, username, blurry, bad feet, cropped, poorly drawn hands, poorly drawn face, mutation, deformed, worst quality, low quality, normal quality, jpeg artifacts, signature, watermark, extra fingers, fewer digits, extra limbs, extra arms,extra legs, malformed limbs, fused fingers, too many fingers, long neck, cross-eyed,mutated hands, polar lowres, bad body, bad proportions, gross proportions, text, error, missing fingers, missing arms, missing legs, extra digit, extra arms, extra leg, extra foot, ((repeating hair))