Video game spacecraft design turnaround plate, photorealistic CG concept art, on a plain light grey background. A huge alien harvester mothership: a dark elongated segmented hull like a deep-sea creature, hanging tentacle-like harvesting arms underneath, rows of glowing amber vents, spines along the back, a big glowing maw at the front, no human-style windows. Original design, not from any film, series, anime or game. No logos, no insignia, no flags, no text markings, no numbers on the craft. Real size 420 m long, 160 m wide, 120 m high. Layout: big orthographic side view across the top, front view, rear view and top view below, and a 3/4 front hero view; callouts naming the main parts and dimensions in metres; material swatches (hull paint, bare metal, heat-scorched metal, glass, engine glow). Rich believable construction detail: panel lines, hatches, thrusters, vents, light wear. No other text.