Low-poly modular straight wall segment, 3D game asset. Geometry must have clean, flat sides for seamless tiling. The top and edges are weathered, cracked, and crumbling stone. Gnarled, skeletal roots wrap around the base. PBR material: dark, damp, matte cobblestone with moss in the crevices. Faint, ethereal green light glows from the deepest cracks. Style: haunted, spooky, ancient, desolate. Optimized for Unreal Engine. Export FBX with Albedo, Normal, Roughness, and Emissive maps.