GPT Image 2.0 中的垂直太空射擊遊戲背景，包含小行星、藍色星云和发光行星

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建立一張垂直的復古像素藝術太空射擊遊戲背景，採用 9:16 手機遊戲畫面比例，設計成具有無縫連續捲動感的關卡背景。場景設定在深邃外太空，背景是由深海軍藍漸變至黑色的星空，並留出寬敞、空曠的中央飛行通道供遊戲進行。沿著通道左側與右側邊緣，加入兩道垂直延伸的發光藍色星雲流，並點綴斑駁的青色粒子、小型亮星和偶爾閃爍的星光。通道周圍設置小行星帶：恰好 34 顆清晰可見的岩石小行星，大小不一、形狀不規則且邊緣鋸齒狀，表面呈深炭灰色，並帶有電光藍色邊緣光。按以下數量與位置安排：左上角 1 顆被畫面裁切的巨大行星，左側邊緣中段 1 顆被畫面裁切的巨大行星，左下邊緣附近 1 顆大型小行星，左下角 1 顆被畫面裁切的大型小行星，右上邊緣附近 1 顆大型小行星，右側邊緣中段附近 1 顆大型小行星，右下邊緣 1 顆被畫面裁切的大型小行星，右下角附近 1 顆大型小行星，另外在左右兩側散布 26 顆較小的漂浮小行星，同時讓中央大致保持空曠。右上象限加入一顆部分進入畫面的大型藍色行星，具有發光的大氣層邊緣、清晰可見的弧形地平線、細緻低調的表面紋理，以及明亮的青色邊緣光。視覺風格：清晰、高細節的像素藝術／16 位元遊戲素材，戲劇性的藍色光效、高對比，無模糊、無使用者介面、無太空船、無角色、無文字、無浮水印。使用電光藍與深海軍藍，垂直 9:16、寬敞空曠的垂直通道、右上象限，以及 34 顆清晰可見的小行星。

Create a vertical retro pixel-art space shooter background, 9:16 mobile game aspect ratio, designed as a seamless-feeling scrolling level backdrop. The scene is deep outer space with a dark navy-to-black starfield and a wide empty central flight corridor for gameplay. Add two luminous blue nebula streams running vertically along the left-center and right-center edges of the corridor, with speckled cyan particles, small bright stars, and occasional star glints. Surround the corridor with an asteroid field: exactly 34 visible rocky asteroids of varying size, irregular jagged shapes, dark charcoal surfaces, and electric blue rim lighting. Count and place them as follows: 1 huge cropped asteroid in the upper left corner, 1 huge cropped asteroid on the mid-left edge, 1 large asteroid near lower-left edge, 1 large cropped asteroid at the bottom-left corner, 1 large asteroid near upper-right edge, 1 large asteroid near mid-right edge, 1 large cropped asteroid on the lower-right edge, 1 large asteroid near bottom-right, plus 26 smaller floating asteroids scattered around the left and right sides while keeping the center mostly open. Include a large blue planet cropped into the upper-right quadrant, glowing atmospheric rim, visible curved horizon, subtle surface texture, and bright cyan edge light. Visual style: crisp high-detail pixel art / 16-bit inspired game asset, dramatic blue lighting, strong contrast, no blur, no UI, no spaceships, no characters, no text, no watermark. Use electric blue and deep navy, vertical 9:16, wide empty vertical corridor, upper-right quadrant, and 34 visible asteroids.