Massive brutalist greenhouse structure with geometric glass panels and raw concrete frame, towering ferns and oversized tropical plants inside, dramatic shafts of overcast light piercing through translucent ceiling, lone caretaker tending to massive potted trees, wet reflective floors, wide cinematic shot, raytracing global illumination, hand-painted watercolor texture, visible brushstrokes, Studio Ghibli architectural style, melancholic atmosphere, deep green and warm amber color palette, architectural visualization render but with frame-by-frame animation aesthetics, Unreal Engine 5 rendering quality