Capture it flat
Scan the sketch or photograph it straight on in even light, then crop to the drawing.
Google · Nano Banana Pro × Sketch to render
Nano Banana Pro Sketch to Render
Turn hand sketches into photoreal architectural renders with Nano Banana Pro in RenderChat. Upload your hand sketch, describe what you want, and refine the render in chat.
Pro plan1K · 2K · 4KEdits continue the chat
Drag to compare the hand sketch with the Nano Banana Pro render. Input is an AI-generated example.
Before you start
Prepare your hand sketch
A sketch carries the idea long before there is a model. Photograph it, tell RenderChat what the lines mean — glass, timber, trees, the time of day — and get a rendered version you can show, discuss and redraw over.
Strengthen faint lines
If the pencil is light, raise the contrast so the important lines read clearly.
Explain the lines
In your brief, say what the ambiguous strokes are: which surfaces are glass, which shapes are trees, where the entrance is.
How it works
Sketch to Render with Nano Banana Pro, step by step
Nano Banana Pro
by Google
- Maker
- Output
- 1K · 2K · 4K
- Aspect ratios
- Auto + 10 fixed ratios
- References
- Up to 14 images
- Follow-ups
- Continues the conversation
- Plan
- Pro
Prepare your hand sketch
Capture it flat, strengthen faint lines and explain the lines. The checklist above has the details.
Open RenderChat with Nano Banana Pro
The start button on this page opens a new chat with Nano Banana Pro selected. You can also pick it from the model menu in the composer.
Upload and write the brief
Attach the image and say what must stay, then the materials, light, setting and people. Start from an example brief below.
Refine in chat
Ask for changes in follow-up messages. Nano Banana Pro continues the same conversation, so a short instruction such as "warmer light, keep everything else" is enough.
Download the render
Download the image at the resolution you chose (1K · 2K · 4K).
Example briefs
Sketch to render briefs to start from
Copy a brief, paste it into RenderChat with your hand sketch, and change the materials and mood to match your project.
Turn this hand sketch into a photoreal render. Follow the perspective and proportions of the drawing. White brick walls, large timber-framed windows, a pitched zinc roof, a gravel path and wild grasses, soft morning light.
Render this sketch as a soft, painterly architectural visualization. Keep the linework visible, add watercolor washes for materials and sky, warm afternoon light.
Nano Banana Pro in RenderChat
Working with Nano Banana Pro
Google's Gemini 3 Pro Image model, known as Nano Banana Pro. RenderChat runs it as a native conversation and accepts a large reference set, part of which can be sent at high fidelity.
- Put the references that must be followed closely (a facade material, a furniture piece) first.
- Name what must stay fixed — massing, openings, camera — before what should change.
Quality check
What to check before you share it
- Lines the AI read differently from your intent — correct them by name in the next message.
- Proportions: loose sketches can stretch or compress in the render.
- Window and door positions on the main facade.
Compare
Other models for Sketch to Render
RenderChat lets you switch models in the same chat. Run your hand sketch through two or three and keep the result that respects your design best.
| Model | Maker | Output | References | Follow-ups | Plan | Guide |
|---|---|---|---|---|---|---|
| GPT Image 2.5 | OpenAI | 1K | Supported | Continues the chat | Free | |
| Nano Banana ProThis page | 1K · 2K · 4K | Up to 14 images | Continues the chat | Pro | ||
| Nano Banana 2.1 | 1K · 2K · 4K | Up to 14 images | Continues the chat | Free | ||
| FLUX.2 Pro | Black Forest Labs | 1K | Up to 9 images | Fresh request | Pro | |
| Seedream 5.0 | ByteDance | 1K · 2K | Up to 10 images | Fresh request | Pro | |
| Kling O3 | Kuaishou | 1K | Up to 10 images | Fresh request | Pro | |
| Reve 2.1 | Reve | 4K | Up to 8 images | Fresh request | Pro | |
| Krea 2 | Krea | 2K | Up to 10 images | Fresh request | Pro | |
| Ideogram 4 | Ideogram | 1K · 2K · 4K | Up to 1 image | Fresh request | Pro | |
| GPT Image 2 | OpenAI | 1K | Supported | Continues the chat | Pro | |
| Nano Banana 2 Lite | 1K | Up to 14 images | Continues the chat | Pro |
More with Nano Banana Pro
Other Nano Banana Pro workflows
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FAQ
Nano Banana Pro Sketch to render questions
Is Nano Banana Pro available on the free plan?
Nano Banana Pro is available on the Pro plan. On the Free plan you can use GPT Image 2.5 and Nano Banana 2.1.
What resolution does Nano Banana Pro render at?
Nano Banana Pro renders at 1K · 2K · 4K in RenderChat, with auto + 10 fixed ratios.
Can I keep refining a Nano Banana Pro result in chat?
Yes. Nano Banana Pro runs as a native conversation in RenderChat, so each follow-up continues from the previous turn. Short edit instructions work well.
How do I select Nano Banana Pro in RenderChat?
Use the start button on this page — it opens a new chat with Nano Banana Pro selected — or choose it from the model menu in the chat composer.
How rough can the sketch be?
Rough is fine if the perspective is legible. The looser the drawing, the more the AI fills in, so describe materials and key elements in words.
Can I keep the hand-drawn character?
Yes. Ask for a painterly or watercolor rendering that keeps the linework instead of a photoreal image.
Try Nano Banana Pro on your hand sketch.
Open RenderChat with Nano Banana Pro selected, upload your hand sketch and start from one of the briefs above.