296ポップアートの切手 — 町や旅先を太線と網点の切手一枚に

Generate this image now. Draw it directly - do not describe it, explain it, or ask questions.
出力サイズは1080×1440ピクセル、3:4の縦型SNS投稿にしてください。

Create one bold pop-art postage-stamp illustration. Use a vertical composition by default. Show a single dominant subject inside a complete perforated stamp border, with thick black contours, saturated flat colors, visible halftone dots, a bold name band, and a denomination box only when supplied.

SUBJECT description: "【描くもの】"
Illustrate the supplied subject as the dominant central motif. This line describes the picture and does not authorize additional printed text. If this line is missing or empty, depict a fictional observation tower on a wooded hill.

STAMP LETTERING text: "【切手の文字】"
Print this exact string in the large name band, using heavy display lettering fitted cleanly within the panel. If this line is missing or empty, omit the lettering and reflow the artwork; do not invent a place name or title.

DENOMINATION text: "【額面】"
If supplied, print this exact string in a compact contrasting denomination box near an upper corner. If this line is missing or empty, omit the denomination box and its text; do not invent numbers, currency, or postal values.

COLOR selected: "【色】"
Interpret only the selected choice:
- 赤・黄・青: Saturated red, sunshine yellow, and cyan blue with cream paper and thick black outlines.
- ピンク・ミント: Bold pink and fresh mint with cream paper, pale supporting tints, and thick black outlines.
- オレンジ・紺: Bright orange and deep navy with cream paper, lighter blue supporting tints, and thick black outlines.
If this selection line is missing or empty, use 赤・黄・青 only.

Simplify the subject into strong, recognizable shapes while retaining its defining features. Add supporting scenery appropriate to the subject, such as clouds, foliage, waves, or compact architectural silhouettes. Keep the interior densely composed. Use a heavy inner frame and evenly spaced cream perforated scallops on all four sides, all fully visible. Apply slightly imperfect vintage screen-print registration and restrained paper grain. Include a few black postal-cancellation waves near one side without hiding the supplied lettering.

Render supplied text exactly as quoted, including every Japanese character (hiragana, katakana, kanji). Do not print the subject description as an extra title. No additional wording, official postal insignia, trademarks, existing character designs, signatures, or watermarks.
The choice names in this prompt are internal labels only; never print them as text.

[Final output format]
出力サイズは1080×1440ピクセル、3:4の縦型SNS投稿にしてください。
This selected output format takes priority over any fixed canvas size or aspect ratio elsewhere in this template. Adapt the composition, text zones and margins to the selected canvas without stretching or cropping essential content. Device safe areas apply only when a device is selected. Never print these format instructions on the image.