low-poly building 3d model

Simple 3D game development building placeholder, solid bright green material, low-poly, clean simple geometry, rectangular multi-story building with a large flat accessible rooftop, wide open rooftop area suitable for gameplay and combat, flat walls, no windows, no doors, no textures, no decorations, no furniture, no signs, no vegetation, no small details, simple untextured geometry, clean silhouette, modular game environment asset, centered, isolated object.