Massive rectangular sci-fi train en...

Massive rectangular sci-fi train engine room, the final and most important chamber of a space train. Fully enclosed solid ceiling, no open sky. Interior filled with a glowing reactor core in the center, thick pipes running along the walls, control panels, blinking screens, and metal catwalks connecting different levels. Dark, dramatic atmosphere lit by cool blue and warm orange emergency lighting. Grand, imposing, high-tech industrial style.