Capture it flat
Scan the sketch or photograph it straight on in even light, then crop to the drawing.
OpenAI · GPT Image 2.5 × Sketch to render
GPT Image 2.5 Sketch to Render
Turn hand sketches into photoreal architectural renders with GPT Image 2.5 in RenderChat. Upload your hand sketch, describe what you want, and refine the render in chat.
Free plan1KEdits continue the chat
Drag to compare the hand sketch with the GPT Image 2.5 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 GPT Image 2.5, step by step
GPT Image 2.5
by OpenAI
- Maker
- OpenAI
- Variants
- Sunburst · Flare
- Output
- 1K
- Aspect ratios
- Auto + 10 fixed ratios
- References
- Supported
- Follow-ups
- Continues the conversation
- Plan
- Free and Pro
Prepare your hand sketch
Capture it flat, strengthen faint lines and explain the lines. The checklist above has the details.
Open RenderChat with GPT Image 2.5
The start button on this page opens a new chat with GPT Image 2.5 Sunburst 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. GPT Image 2.5 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).
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.
GPT Image 2.5 in RenderChat
Working with GPT Image 2.5
OpenAI's GPT Image 2.5, offered in RenderChat as two variants, Sunburst and Flare. Both run as native conversations, so every follow-up message keeps working on the same image thread. Sunburst is RenderChat's default model.
- Start with Sunburst. Switch to Flare in the model menu when you want a second read of the same brief.
- Write follow-ups as edits ("keep everything, warm the light") rather than restating the whole brief.
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 2.5This page | OpenAI | 1K | Supported | Continues the chat | Free | |
| Nano Banana Pro | 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 GPT Image 2.5
Other GPT Image 2.5 workflows
GPT Image 2.5 SketchUp AI RenderGPT Image 2.5 Revit AI RenderGPT Image 2.5 Rhino AI RenderGPT Image 2.5 Archicad AI RenderGPT Image 2.5 Blender AI RenderGPT Image 2.5 3ds Max AI RenderGPT Image 2.5 Floor Plan to 3D RenderGPT Image 2.5 Massing Model to RenderGPT Image 2.5 Renovation RenderGPT Image 2.5 Exterior AI RenderGPT Image 2.5 Interior AI RenderGPT Image 2.5 Aerial AI RenderGPT Image 2.5 Day to Night RenderGPT Image 2.5 Landscape AI RenderGPT Image 2.5 Material Variation RenderGPT Image 2.5 Render Enhancement
FAQ
GPT Image 2.5 Sketch to render questions
Is GPT Image 2.5 available on the free plan?
Yes. GPT Image 2.5 is available on the Free plan as well as Pro.
What resolution does GPT Image 2.5 render at?
GPT Image 2.5 renders at 1K in RenderChat, with auto + 10 fixed ratios.
Can I keep refining a GPT Image 2.5 result in chat?
Yes. GPT Image 2.5 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 GPT Image 2.5 in RenderChat?
Use the start button on this page — it opens a new chat with GPT Image 2.5 Sunburst 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 GPT Image 2.5 on your hand sketch.
Open RenderChat with GPT Image 2.5 selected, upload your hand sketch and start from one of the briefs above.