エリザベス朝演劇 透過切り抜き

Remove only the sky area and make it fully transparent. Keep the entire wooden Elizabethan theater completely unchanged — every detail of the wooden roof, thatched roof, balconies, railings, stage, columns, walls, textures, lighting, shadows and colors must be preserved exactly as in the original. Do not alter, regenerate, or modify any part of the theater. Do not add any background, color, or gradient. The sky area should be fully transparent with a proper alpha channel. Output as PNG with transparency.