LIGHTING & MOOD (these govern light, color and surface rendering):
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- MATERIAL REALISM: every object and surface must read as a real,
  physical material — correct texture, weight, wear and light response
  (metal reflects, fabric drapes and creases, liquid is glossy and
  pools, painted or drawn marks sit ON a surface and follow its
  curvature and lighting). Nothing may look like a flat sticker, a
  doodle or a graphic overlay pasted onto the frame.