2D pixel art far background layer, orthographic front view, enormous bulkhead walls of alien megastructure, massive sealed gates, thick armored plating, minimal detail, very dark palette with subtle blue-grey highlights, Terraria style deepest parallax layer, pixel art, seamless tile, atmospheric, game asset 2D pixel art distant background, orthographic view, colossal space station interior walls fading into darkness, giant reinforced panels, faint emergency lights, dark void atmosphere, Terraria style far parallax, minimal detail silhouette, tileable horizontally