Turn sketches into images

Frequently asked questions

Which models are the fastest?

If speed is your priority, the fastest options tend to be the lighter-weight editing models. Nano-Banana and Qwen Image Edit Plus offer quick turnaround for moderate edits and compositional adjustments. Heavier high-resolution models like Seedream-4 can take longer, especially at 4K resolution. Always check estimated inference time for your target size.

Which models offer the best balance of cost and quality?

For a solid mix of quality and cost, Qwen Image Edit Plus and FLUX.1 Kontext-Max strike a great balance. They produce detailed results without the premium cost of higher-end models. If you need ultra-high fidelity or multi-reference workflows, Seedream-4 delivers, but with higher compute and cost.

What works best for turning a rough sketch into a full image or illustration?

If you’re starting from a rough sketch or line-art, Seedream-4 is a strong choice. It supports both generation and editing from references, including multi-reference workflows, and produces up to 4K outputs. For simpler sketches where you want faster results, Qwen Image Edit Plus or FLUX.1 Kontext-Max are reliable options.

What works best for editing a sketch into a full scene (backgrounds, objects, style transfer)?

If you want to expand a sketch into a full scene, by adding detail, changing style, or replacing background, try FLUX.1 Kontext-Max. It’s optimized for text-driven editing and style manipulation, including typography and object-level control. Seedream-4 can also handle full-scene editing but is geared toward high-quality, multi-reference workflows. Qwen Image Edit Plus performs well for compositional edits and preserving fine details.

What’s the difference between key subtypes or approaches in this collection?

In this “Sketch to Image” collection, there are two main flavors:

• Generation-first models: Start from scratch (prompt + sketch) to create a new image. Seedream-4 fits here with strong generation and reference support.
• Editing-first models: Modify an existing sketch or image while keeping structure. Qwen Image Edit Plus and FLUX.1 Kontext-Max are in this group.
  You’ll also see differences in resolution (standard vs 4K), support for text, and how closely the model adheres to your prompt.

What kinds of outputs can I expect from these models?

You can expect polished, colorized versions of sketches, stylistic transformations, and detailed concept images. Seedream-4 supports ultra-high-res output and multi-reference image generation. Qwen Image Edit Plus maintains clean lines and text accuracy. FLUX.1 Kontext-Max focuses on prompt fidelity and stylistic precision.

Can I use these models for commercial work?

Each model page, such as FLUX.1 Kontext-Max or Qwen Image Edit Plus, includes license details. Always check the terms before using outputs in products, media, or resale contexts.

How do I use or run these models?

You can run them through Replicate web UI or via API. Upload your sketch or reference image, then enter a text prompt describing the desired output. For example, with Seedream-4 you might prompt “turn this pencil sketch into a watercolor-style landscape.” With Qwen Image Edit Plus, you could edit a sketch that includes text while preserving layout and font.

What should I know before running a job in this collection?

• Inputs matter: Clean sketches with clear lines yield better results.
• Resolution affects time and cost: 4K generations (like those from Seedream-4) are slower and pricier than smaller runs.
• Prompts shape detail: Describe style, lighting, and material clearly.
• Reference images: Some models support single or multi-reference workflows; others may overwrite the sketch entirely.
• Batch testing: Run a few test jobs to find your best settings before scaling.

Any other collection-specific tips or considerations?

• If your sketch includes text or labels, Qwen Image Edit Plus or FLUX.1 Kontext-Max handle typography best.
• For high-res art or multi-reference image synthesis, go with Seedream-4.
• Nano-Banana is a good option for experimentation or lower-cost runs when you’re iterating ideas quickly.
• Use descriptive, structured prompts (e.g., “convert this sketch to a vibrant cyberpunk city at sunset”) for more consistent results.
• Remember that the best outputs come from well-prepared inputs. Clean sketches and clear intent go a long way.

What if I want to automate sketch-to-image workflows in an app?

Choose models that support batch jobs or multi-reference input, such as Seedream-4. Set up your workflow so it can dynamically adjust style, resolution, and prompts per sketch. For automation, you can mix models. For example, you can generate rough color concepts with Nano-Banana and refine them with FLUX.1 Kontext-Max.