Mastering Soft-Focus Bokeh in Nano Banana 2 Lite for Product Photography

Product photography often relies on a shallow depth of field to draw the viewer's eye directly to the subject. This technique, known as bokeh, blurs the background while keeping the product sharp. While professional cameras achieve this through lens physics, AI image generation tools like Nano Banana 2 Lite simulate it through descriptive language. Nano Banana refers to the AI image generation and editing tool discussed here; it is not a skincare brand, bottle, jar, or physical subject. For users working with generic, unbranded items, mastering this effect is essential for creating clean, commercial-grade visuals.

Nano Banana 2 Lite, identified by Google as Gemini 3.1 Flash Lite Image, is designed with speed and cost efficiency in mind. However, its architecture has specific constraints. It is not optimized for multiple reference inputs or multi-turn sequential editing workflows. Consequently, achieving complex effects like precise bokeh requires a robust single-image prompt strategy rather than relying on iterative adjustments or uploading multiple reference images. Users must craft their initial text instructions carefully to ensure the model understands the desired optical effect immediately.

Understanding the Single-Image Constraint

Because Nano Banana 2 Lite lacks multi-reference support, you cannot upload a photo of your specific product alongside a reference image of a blurred background and expect the AI to merge them perfectly. Instead, the workflow relies entirely on the text prompt to describe both the object and the lighting environment. The prompt instructions describe desired outcomes but do not guarantee identity, label, object, or typography preservation. This means if you are generating an image from scratch, you must be very specific about the product shape and material to avoid unwanted artifacts.

When using this model, focus on describing the camera settings that create bokeh. Terms like "f/1.8 aperture," "shallow depth of field," and "background blur" act as direct commands to the underlying Gemini 3.1 Flash Lite Image engine. Since the model prioritizes speed, it may simplify complex textures if the prompt is too vague. Therefore, clarity regarding the product's isolation is key. You are essentially asking the AI to render a scene where the background exists only to provide context through softness, not detail.

Five Prompt Strategies for Bokeh Effects

To help you get started, here are five materially different usable prompts tailored for Nano Banana 2 Lite. These examples demonstrate how to vary the background texture, lighting, and product type while maintaining the core goal of soft-focus isolation. Please note that these are example prompts and results may vary based on the specific input data.

1. The Minimalist White Background Prompt: "A sleek glass perfume bottle on a pristine white surface, shot with a macro lens at f/1.8, creating a creamy, out-of-focus white background bokeh, soft studio lighting, high resolution, no text." Use Case: Ideal for e-commerce listings where a clean, distraction-free look is required. This works best when the product itself is simple and geometric. Adjustment: If the background appears too flat, add "subtle gradient" to introduce a hint of color transition behind the blur.

2. The Warm Wooden Texture Prompt: "A ceramic coffee mug sitting on a rustic wooden table, warm golden hour sunlight, heavy background blur with circular bokeh highlights, shallow depth of field, photorealistic, unbranded." Use Case: Perfect for lifestyle branding or social media posts that need a cozy, organic feel. The wood grain provides texture even when blurred. Adjustment: To increase the warmth, specify "amber tones" in the lighting description.

3. The Urban Night Scene Prompt: "A modern smartwatch floating against a city skyline at night, long exposure style, vibrant colorful bokeh lights from distant buildings, dark foreground, cinematic lighting, 8k." Use Case: Best for tech products or luxury items where a dynamic, energetic atmosphere is desired. The contrast between the sharp watch and colorful lights creates drama. Adjustment: If the lights are too sharp, explicitly request "large defocused orbs" to soften the light sources further.

4. The Natural Garden Setting Prompt: "A small potted succulent plant on a stone ledge, soft morning mist, lush green foliage in the background rendered as a smooth green wash, natural daylight, soft focus." Use Case: Suitable for eco-friendly products or wellness items. The green wash ensures the product stands out without competing with specific leaf details. Adjustment: To make the product pop more, add "high contrast" to the prompt.

5. The Abstract Geometric Blur Prompt: "A silver metallic sphere on a black surface, abstract geometric shapes in the background heavily blurred into soft gradients, dramatic rim lighting, studio setup, minimalist composition." Use Case: Great for artistic product shots or concept art where the background is purely decorative. This removes all environmental context. Adjustment: If the sphere looks too dull, specify "reflective chrome finish" to enhance the light interaction.

Optimizing for Speed and Clarity

Since Nano Banana 2 Lite focuses on speed, complex prompts might take longer to process or yield inconsistent results if they contain conflicting instructions. Keep your descriptions concise but dense with visual keywords. Avoid asking for specific brand names or logos, as the model does not guarantee identity preservation. Instead, focus on materials, colors, and lighting conditions.

For those looking to explore more advanced features or different model capabilities, you can visit the Try Nano Banana page. Remember that while Nano Banana 2 Lite is excellent for quick iterations, it is distinct from Nano Banana Pro (Gemini 3 Pro Image), which may offer different strengths for complex tasks. By understanding these limitations and crafting precise single-image prompts, you can effectively simulate professional depth-of-field effects for any generic product photography need.

Always remember that prompt instructions describe desired outcomes; they do not guarantee identity, label, object, or typography preservation. Treat every generation as a creative starting point that may require slight tweaking of your wording to achieve the perfect balance between the sharp subject and the dreamy background.