Habitat Module

Rectangular habitat module, footprint exactly 8x4m, single story 3m tall plus a shallow rounded roof, off-white hull with gunmetal frame lines, a standard airlock collar (3m wide, 3m tall, orange ring) centered on each 4m end face flush at the footprint edge.

风格：low-poly, flat-shaded vertex colors, no textures, 2 materials: the shared opaque one plus a distinct surface (glass, water or chrome), which stays its own mesh through mergeAssets rather than merging into the rest; shares palette and scale with its kit