提示词库 · T恤设计
十个实测的可穿着图案提示词——复古太阳徽章、单线条植物、张扬的街头风插画——全部按纯色背景上的独立图稿生成，可直接抠图放到服装上。
几乎所有人都会犯的错，是去要「a t-shirt with a design on it」。那给你的是一张T恤的照片——毫无用处，因为你没法把T恤的照片印到T恤上。你要的是图稿本身：「Vintage screen-print style graphic of a sun setting behind three mountain ridges, isolated on a flat cream background, centred, no shirt, no mockup」。在每条提示词里都写上「isolated graphic on a plain background, no garment in frame」，你才能拿到真正能用的文件。
接下来是两句话在干活。印刷工艺——「vintage screen print with slight ink texture and a limited three-colour palette」「bold flat vector illustration with heavy black outlines」「fine monoline single-weight linework」——决定了整体观感，也决定了它印出来能撑到什么程度。颜色数量还牵涉到成本：丝网印刷按颜色收费，所以「limited three-colour palette of rust, cream and navy」既是风格选择，也是一个成本决定。下面每张图都是在BananaBanana上生成的未修改首次输出。
别写进提示词。图像模型至今仍会把小号字弄坏——一个单词回来时可能多出一个字母、出现奇怪的连字，或者是任何排版师都不会放行的字距——而印在衣服上，这个错误会被复制一千遍。所以本页每条提示词都只要图稿，并明确写上「no text, no lettering」。
文字之后自己在任意矢量或设计工具里排，压在生成的图稿上。你会得到真正的字体和真正的字偶间距，标语一改一键就能改，在印刷分辨率下边缘也锐利。这与logo提示词遵循的是同一条规则，也正是「看起来做得像回事的设计」和「审核被打回的设计」之间的区别。如果你希望图案给标语留出位置，直接说出来——「leave clear empty space beneath the illustration for a headline」——模型会照此构图。
下面每张图片都是所在卡片提示词的未修输出——没有从几十次尝试里挑好的，也没有修图。模型徽标标明了它由什么生成、花了多少钱。
Vintage screen-print graphic of a setting sun with straight radiating rays behind three layered mountain ridges, enclosed in a circular badge with a thin double outline. Limited three-colour palette of rust orange, cream and deep navy, slight halftone ink texture, weathered distressed edges. Isolated artwork on a flat cream background, centred with margin, no shirt or mockup, no text or lettering.
Fine monoline illustration of a wild fennel stem with two seed heads and three slender leaves, drawn in a single consistent line weight with no fills. Deep forest green line on a flat off-white background, elegant and minimal, generous empty margin around the artwork. Isolated graphic, no shirt or mockup, no text or lettering.
Bold streetwear illustration of a tiger's head seen straight on, stylised with heavy black outlines, flat colour blocking and sharp angular shapes. Limited palette of burnt orange, black, bone white and one teal accent. Graphic and confident, poster-like. Isolated artwork on a flat light grey background, centred with margin, no shirt or mockup, no text or lettering.
Linocut-style print of a breaking ocean wave with carved directional gouge marks in the water and foam, plus three small birds above the crest. Single deep indigo ink on a flat warm paper-white background, visible hand-carved texture and imperfect edges. Isolated artwork, centred with margin, no shirt or mockup, no text or lettering.
Retro 1980s screen-print graphic of a cassette tape at a three-quarter angle with a ribbon of tape unspooling into a curling wave beneath it. Limited four-colour palette of hot pink, cyan, cream and black, subtle halftone dots, slight print misregistration for authenticity. Isolated artwork on a flat black background, centred with margin, no shirt or mockup, no text or lettering.
Psychedelic-folk illustration of three tall mushrooms of different heights inside a rounded arch frame, with small stars and a crescent moon in the negative space above them. Muted seventies palette of mustard, terracotta, sage and cream, flat colours with fine texture, symmetrical composition. Isolated artwork on a flat cream background, centred with margin, no shirt or mockup, no text or lettering.
Bold flat vector illustration of a skateboard deck tilted diagonally with stylised flames curling off the tail, heavy black outlines and simple colour blocking. Limited palette of red, orange, black and off-white, no gradients, sticker-like graphic energy. Isolated artwork on a flat pale grey background, centred with margin, no shirt or mockup, no text or lettering.
Traditional-tattoo-influenced illustration of two koi swimming in a circle head to tail, framed by stylised water swirls and three lotus blooms. Bold black linework with flat colour fills in coral, cream and slate blue, symmetrical circular composition. Isolated artwork on a flat bone-white background, centred with margin, no shirt or mockup, no text or lettering.
Vintage outdoors badge graphic in the shape of a rounded rectangle: a canvas tent beside two pine trees, a campfire with a curl of smoke, and a range of hills behind, all inside a thin border. Limited three-colour palette of forest green, cream and burnt orange, halftone texture, retro national-park feel. Isolated artwork on a flat cream background, centred with margin, no shirt or mockup, no text or lettering.
Minimal abstract composition of overlapping organic shapes — a circle, a soft arch and two curved ribbons — arranged asymmetrically with visible risograph-style grain and slight colour overlap where the shapes cross. Limited palette of clay pink, ochre and deep teal on a flat off-white background. Isolated artwork, centred with generous margin, no shirt or mockup, no text or lettering.
「Isolated graphic on a flat background, no shirt, no mockup」——这就是印刷文件和产品照片之间的全部差别。每条提示词都加上，没有例外。
「Limited three-colour palette of rust, cream and navy」看起来像真正的丝网印刷，实际印起来也更便宜，因为印厂按颜色收费。这同时是风格决定和利润决定。
模型至今仍会把小号字排坏，而一个错误的连字印在500件衣服上代价高昂。先干干净净地生成图稿，再用真正的字体把标语排上去。
「Vintage screen print with halftone texture」「linocut with visible gouge marks」「flat vector with heavy outlines」各自产出真正不同且自洽的观感——印刷时的表现也各不相同。含糊的「cool design」类提示词只会还你一团糊。
可以——你在BananaBanana上生成的图片归你所有，包括用于按需印刷。有些平台要求上传时声明AI生成的图稿，所以请查一下你销售所在平台的规则，并像这里的提示词一样，不要写进品牌名和受版权保护的角色。
按常见尺寸做胸前印花，这个分辨率算擦边——小图案可用，满幅前胸印就吃紧了。凡是大图都在Nano Banana 2或Pro上按2K生成，并优先选扁平、高对比的风格：它们放大时比细节繁多、带肌理的图稿从容得多。
像这些提示词那样在纯色平背景上生成，再在任意编辑器里一次抠掉——粗描边和平涂色块抠得很干净。直接向模型要透明背景没用；它无论如何都输出不透明图像。
能，而且扁平风格转起来很直接：把图导进矢量工具描摹一遍即可。扁平矢量、木刻和徽章类设计几乎能完美描摹；半调网点和厚重颗粒肌理则不行，所以选风格时要把最终格式考虑进去。
固定风格和配色那句话，只更换主体——就像上面的徽章和露营设计共用同一套处理方式。一整店共享同一配色的设计读起来像个品牌；一堆互不相干的单品读起来像清库存。
