2x2 grid, do this for 4 iconic large machines in history, 16:9 AR<canvas_base> A massive, dusty, slate-green university chalkboard. Covered in dense, AI-inferred, highly accurate PhD-level calculus, physics formulas, and rough chalk diagrams related to [$scientific_machine]. </canvas_base> <physical_manifestation> - Resting on the wooden chalk-ledge at the bottom of the board is the physical, real-world 3D [$scientific_machine]. - Scale: It is massive, jutting out toward the camera. - Materiality: Heavy iron, glowing vacuum tubes, ticking copper gears. - Interaction: The chalk lines on the board physically connect to the 3D machine. Powdery chalk dust has fallen onto the polished metal of the machine. </physical_manifestation> <lighting> Harsh overhead fluorescent lecture-hall lighting, casting a deep, heavy shadow from the 3D machine directly onto the flat chalkboard behind it. </lighting>