AIAI for Architecture

Sketch to Image

6 worked sketch to image examples with 8 prompts. Each shows the input and the real output from Nano Banana and ChatGPT. Every prompt in this lesson is free.

✦ Before → After6 examples17 imagesFree Lesson

How to use these prompts

  1. Open Nano Banana (Google Gemini) or ChatGPT.
  2. If the example starts from an image, upload your own sketch, model screenshot, photo or plan.
  3. Paste the prompt and adjust the materials, light and style words to your project.
  4. Refine in the same chat, e.g. "keep the composition, change to dusk lighting".

About this lesson

Sketch to Image is part of Common Uses: Sketch, model and photo to finished rendering with Nano Banana and ChatGPT. Most of the 6 examples here run the same prompt through both Nano Banana and ChatGPT, so you can compare the two directly.

Example 01
Sketch to Image – Example 1: Nano BananaSketch to Image – Example 1: ChatGPT
Nano BananaChatGPT

Nano Banana → ChatGPT

Nano Banana · Free prompt

Based on this architectural sketch, generate a realistic 3D rendering of a modern architecture building. Apply daylight conditions with natural shadows and reflective materials. The final image should resemble a professional visualization in the style of architecture competition renderings — cinematic, detailed, and photorealistic.

根据这张建筑草图,生成一张现代建筑的写实 3D 效果图。采用日光条件,呈现自然阴影和反射材质。最终图像应接近建筑竞赛效果图风格的专业可视化——电影感、细节丰富、照片级真实。

ChatGPT · Free prompt

[Sketch to Render] A modern architecture building rendered from a hand-drawn sketch to a realistic visualization. Daytime lighting, cinematic atmosphere, detailed materials, realistic reflections and shadows. Rendered in the style of architecture competition — clean, sharp, photorealistic, architectural visualization.

[草图转效果图] 一栋现代建筑,从手绘草图渲染为写实可视化效果。日间光照,电影感氛围,材质细节丰富,反射与阴影真实。采用建筑竞赛效果图风格——干净、锐利、照片级真实的建筑可视化。

Example 02
Sketch to Image – Example 2: Hand DrawingSketch to Image – Example 2: Nano Banana
Hand DrawingNano Banana

Hand Drawing → Nano Banana → ChatGPT

Nano Banana · Free prompt

Color this black-and-white landscape plan in a hand-rendered style. Use soft watercolor textures combined with vivid marker strokes. Emphasize plant areas with layered green tones, hardscape with warm grays, and water features with translucent blue washes. Maintain a clean, architectural layout while showcasing a vibrant, artistic look.

以手绘风格为这张黑白景观平面图上色。使用柔和的水彩质感,结合鲜明的马克笔笔触。种植区用层次丰富的绿色调突出,硬质景观用暖灰色,水景用半透明的蓝色淡彩。保持整洁的建筑式布局,同时呈现生动、富有艺术感的效果。

ChatGPT · Free prompt

Color my landscape architecture plan, hand-rendered in watercolor and marker style.

为我的景观平面图上色,采用水彩加马克笔的手绘风格。

Example 03
Sketch to Image – Example 3: BeforeSketch to Image – Example 3: Nano Banana
BeforeNano Banana

Nano Banana → ChatGPT

Prompt · Free prompt

Convert this hand-drawn landscape design into a clean, professional top-down landscape architecture plan. Retain the original layout and spatial composition, but enhance it with accurate linework, consistent geometry, and digital textures. Apply realistic plant symbols, soft green lawn textures, top-view trees and shrubs, and clean paving patterns. Use a modern landscape graphics style with clear zone differentiation, muted tones, and professional color palette. Remove sketchy lines and noise — the final rendering should look polished and presentation-ready for a landscape architecture portfolio or competition board.

将这张手绘景观设计图转换为干净、专业的顶视景观平面图。保留原有布局和空间构成,但用精确的线条、统一的几何形体和数字纹理加以提升。使用写实的植物图例、柔和的绿色草坪纹理、顶视乔木与灌木,以及整洁的铺装图案。采用现代景观图示风格,分区清晰、色调柔和、配色专业。去除草图线条和杂点——最终效果应精致完整,可直接用于景观作品集或竞赛展板。

Example 04
Sketch to Image – Example 4: SketchSketch to Image – Example 4: Nano Banana
SketchNano Banana

Sketch → Nano Banana → ChatGPT

Nano Banana & ChatGPT · Free prompt

Render my sketch of a modern house and backyard. The facade uses smooth white stucco and dark aluminum panels. The backyard is landscaped with native California plants. Realistic materials, natural daylight, soft shadows, clean modern style.

渲染我画的现代住宅及后院草图。立面采用光滑的白色灰泥和深色铝板。后院种植加州本土植物。材质写实,自然日光,阴影柔和,风格简洁现代。

Example 05
Sketch to Image – Example 5: BeforeSketch to Image – Example 5: Nano Banana
BeforeNano Banana

Nano Banana → ChatGPT

Nano Banana & ChatGPT · Free prompt

Render my urban design plan in realistic rendering style.

将我的城市设计平面渲染为写实效果图风格。

Example 06
Sketch to Image – Example 6: BeforeSketch to Image – Example 6: Nano Banana
BeforeNano Banana

Nano Banana → ChatGPT

Nano Banana & ChatGPT · Free prompt

A modern minimalist living room with a high ceiling in perspective view. White walls, clean lines, and soft natural light. The space features sleek contemporary furniture, large windows, and a Wood slat ceiling ceiling. Calm, airy atmosphere with neutral tones and subtle textures. Architectural visualization style.

一间挑高的现代极简客厅透视图。白色墙面、简洁线条、柔和的自然光。空间内有利落的当代家具、大窗户和木格栅吊顶。氛围安静通透,色调中性,质感细腻。建筑可视化风格。

Questions

Sketch to Image

What do I need to do sketch to image with AI?

Only Nano Banana and ChatGPT. Upload your source image and paste a prompt from this page. There are 6 worked examples here to follow.

Is Nano Banana or ChatGPT better for sketch to image?

Most examples on this page run the same prompt through both tools and show the results side by side. Nano Banana usually keeps the composition and geometry of the input closer, while ChatGPT pushes the style further.

Can I use these prompts for client work?

Yes. The prompts can be used in your own design projects, competitions and portfolio.

More lessons

Common Uses, the everyday rendering moves.

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