Fantasy Sky Castle Art Evolution Triptych

Goal: Create a wide horizontal triptych showing the same fantasy sky-kingdom scene rendered in three progressive art stages, like a concept art evolution from rough sketch to finished illustration.

Canvas: Very wide 3-panel image, approximately 2:1 aspect ratio, divided into exactly 3 equal vertical panels with no visible borders beyond the panel edges.

Layout: Each panel shows the same composition from a dramatic low, tilted perspective: a young fantasy knight stands in the lower foreground on a stone bridge or stairway, looking toward the viewer, holding or surrounded by a long flowing pale mint cloak that streams leftward in the wind. Behind the knight is a grand floating castle city suspended in a bright blue sky, with cables, stone columns, ruins, greenery, and clouds creating strong depth and motion lines.

Panel count and descriptions: Use exactly 3 panels. Panel 1, left: loose rough concept sketch with pale blue sky wash, visible construction lines, scribbly black pencil strokes, unfinished architecture, motion streaks, and minimal muted color. Panel 2, center: clean anime-style colored illustration with strong ink outlines, cel-shaded armor, saturated blue sky, fluffy clouds, green terraces, stone bridge details, and a floating castle in the distance. Panel 3, right: highly polished final fantasy illustration with sparkling sunlight, dense architectural detail, vivid blue sky, bright white clouds, lush green vines and trees, glowing highlights, painterly rendering, and cinematic clarity.

Subject details: The foreground character is a young blond fantasy knight, wearing ornate silver-and-gold armor with leather straps, boots, gloves, and a large flowing pale mint-white cape. The face may be softly simplified or obscured, but the body should face forward in a heroic pose with the cape sweeping dramatically across the scene. Keep the character consistently placed in all 3 panels: lower center foreground, slightly larger in the right panel, with the same costume and pose.

Environment details: The setting is a floating castle city above the clouds. Include suspended stone platforms, carved pillars, bridge railings, hanging cables or ropes stretching diagonally across the sky, fragments of ancient ruins, patches of green grass, ivy, trees, and many white clouds. The background castle should be tall, ornate, vertical, and luminous, with towers and terraces stacked upward.

Visual style: Japanese fantasy anime concept art, dynamic perspective, wind-swept movement, adventurous mood, luminous sky palette. Main colors are sky blue, cloud white, pale mint, stone gray, gold, and fresh green. The right panel should feel magical and camera-facing with sparkling highlights and refined detail, while the left panel remains visibly unfinished.

Constraints: No captions, no logos, no watermarks, no text overlays. Maintain exactly 3 vertical stages of the same scene. Emphasize the progression from rough sketch to clean color to final polished fantasy key art.