google/gemini-3-pro-image-preview/text-to-image

What makes Gemini 3 Pro stand out

Gemini 3 Pro is a high-fidelity text-to-image generator built to convert precise instructions, sketches, or references into production-grade visuals. It emphasizes structural coherence, realistic materials, and stable composition while enabling 4K output and responsive iteration. Designed for professional, educational, and commercial use, Gemini 3 Pro balances creative depth with factual faithfulness to the prompt, delivering images aligned with described subjects, attributes, and context. Controls for resolution, aspect ratio, and format support consistent pipelines across editorial, product, and instructional workflows. Key capabilities:

• 4K-ready synthesis with clear detail and clean microstructure.
• Structure-aware composition when guided by sketches or references.
• Prompt-faithful rendering of objects, colors, and relationships.
• Fast iteration loop suitable for real-time refinement and versioning.
• Explicit framing via aspect_ratio from 21:9 to 9:16.
• Flexible output formats (png, jpeg, webp) and batched generation via num_images.

Prompting guide for Gemini 3 Pro

Start by stating the subject, setting, materials, lighting, and style in concrete terms. Specify what to include and what to avoid. Attach a sketch or reference when layout or style transfer matters and describe how it should guide the result. Set parameters explicitly: aspect_ratio for framing, resolution for detail level (1K, 2K, 4K), output_format for delivery, and num_images for variation. Use concise, unambiguous language so Gemini 3 Pro can prioritize the most important attributes. For immediate inline retrieval, enable sync_mode as needed, then iterate with small edits for control. Examples:

• "Studio product photo of a stainless steel water bottle on matte concrete, soft top light, subtle reflections." Parameters: aspect_ratio=4:5, resolution=4K, output_format=png.
• "Aerial view of terraced rice fields at sunrise, light fog, natural color, fine texture." Parameters: aspect_ratio=21:9, resolution=2K, output_format=jpeg.
• "Oil painting of a lighthouse in a storm, heavy impasto texture, cool palette." Parameters: aspect_ratio=3:2, resolution=1K, output_format=webp, num_images=3.
• "Modern classroom visual of the water cycle, minimal, clear iconography, white background." Parameters: aspect_ratio=16:9, resolution=2K, output_format=png.
• "From sketch: creature concept, preserve silhouette and pose, add iridescent scales and rim light." Parameters: aspect_ratio=1:1, resolution=4K, output_format=png. Pro tips:
• State constraints explicitly: what to preserve and what to change.
• Use spatial and numeric terms: left, foreground, upper-right, three trees, single subject.
• Prefer a few strong descriptors over many competing adjectives.
• Choose aspect_ratio early to avoid reframing; adjust resolution only when needed.
• Iterate in short steps; use num_images>1 for controlled variation and sync_mode=true for immediate previews with Gemini 3 Pro.