Nano Banana 2 Prompts for Creating Realistic Glass Reflection Effects on Product Shots

Creating professional product photography often requires expensive lighting rigs, polarizing filters, and controlled environments to capture the perfect sheen on transparent surfaces. With Nano Banana, users can bypass these physical constraints by leveraging advanced text-to-image capabilities. The tool allows you to generate images where light interacts with glass in a physically plausible manner, simulating refraction and reflection that would typically take hours to set up in a real-world studio.

This guide focuses specifically on generating realistic glass reflection effects. Whether you are a product reviewer needing high-fidelity visuals or a designer creating mockups, understanding how to craft precise instructions is key. Note that while Nano Banana refers to the AI image generation and editing tool, it does not represent a specific skincare brand or physical bottle. The generated subjects are generic unless specified otherwise. For those ready to experiment with these techniques, Try Nano Banana to access the generator directly.

Understanding Refraction and Specular Highlights

The core challenge in rendering glass is balancing transparency with reflectivity. A prompt must explicitly describe how light bends (refracts) as it passes through the material and how it bounces off the surface (specular highlights). Without these details, the AI may produce plastic-looking objects rather than true glass.

When writing your instructions, focus on environmental context. Mentioning the light source direction, such as "softbox lighting from the top-left," helps the model calculate where the brightest reflections should appear. Additionally, specifying the background environment is crucial because glass reflects its surroundings. If the background is a neutral gray, the glass will show subtle gray gradients; if it is a cityscape, the glass will mirror those shapes. These prompts are engineered to simulate accurate light refraction and reflection on transparent surfaces within generated backgrounds, helping product reviewers achieve professional studio-quality lighting without physical equipment.

It is important to remember that prompt instructions describe desired outcomes but do not guarantee identity, label, object, or typography preservation. If you need specific branding, you may need to rely on image-to-image workflows or post-processing, as the AI prioritizes the visual effect of the material over exact textual fidelity.

Five Materially Different Prompt Strategies

To achieve varied results, we have developed five distinct prompt structures. Each targets a different aspect of glass rendering, from clear water-like transparency to heavy, refractive crystal. Below are examples of how to structure these requests. Please note that these are untested prompt examples intended to illustrate the syntax and logic required for optimal results.

1. The Minimalist Clear Bottle

Use Case: Ideal for showcasing clean, simple packaging like water bottles or essential oils where purity is the main selling point. Prompt Example: A pristine clear glass bottle filled with water, isolated on a white background. Soft studio lighting creates sharp specular highlights on the rim and gentle refraction through the liquid. No labels, minimalist design. Adjustment: Increase the contrast slightly if the image appears too flat. This prompt works best when the goal is to emphasize the clarity of the liquid inside.

2. The Luxury Perfume Vial

Use Case: Perfect for high-end cosmetics or fragrances requiring a sense of weight and elegance. Prompt Example: An elegant amber glass perfume bottle with a gold cap, sitting on a dark marble surface. Dramatic side lighting creates deep, rich reflections and complex refractions showing the texture of the stone. Cinematic atmosphere, macro photography style. Adjustment: Add keywords like "volumetric lighting" or "dust particles" to enhance the mood. This strategy relies heavily on the interaction between the colored glass and the dark background.

3. The Industrial Chemical Container

Use Case: Suitable for scientific products or industrial chemicals where durability and sterility are implied. Prompt Example: A robust translucent plastic or glass container holding a blue chemical solution, placed on a sterile metal table. Bright overhead fluorescent lighting creates harsh, linear reflections on the curved surface. High detail, clinical aesthetic. Adjustment: Specify "matte finish" on the surrounding objects to make the glossy container pop. This prompt emphasizes the functional nature of the object rather than luxury.

4. The Crystal Decanter

Use Case: Best for beverages or decorative items where intricate patterns and light dispersion are the focus. Prompt Example: A cut-crystal decanter filled with whiskey, resting on a wooden bar. Warm ambient lighting causes the crystal facets to scatter light into rainbows. Sharp edges, high gloss, photorealistic rendering. Adjustment: Use terms like "dispersion" or "prism effect" to encourage the AI to render more complex light paths. This is useful when the geometry of the glass itself is the subject.

5. The Abstract Liquid Drop

Use Case: Useful for artistic backgrounds or close-up textures where the shape of the glass is secondary to the fluid dynamics. Prompt Example: A single large droplet of clear liquid suspended in mid-air against a blurred bokeh background. Extreme close-up showing internal refraction and total internal reflection. Macro lens, shallow depth of field. Adjustment: Focus on the background blur description to ensure the droplet remains the focal point. This prompt isolates the physics of the liquid drop from any container.

Selecting the Right Model for Your Needs

While Nano Banana offers various models, choosing the correct one impacts the quality of your glass effects. Google documents Nano Banana 2 as Gemini 3.1 Flash Image, which balances speed and quality. For more complex scenes involving multiple reference inputs or detailed sequential editing, Nano Banana Pro (Gemini 3 Pro Image) might be preferable. However, be aware that Nano Banana 2 Lite (Gemini 3.1 Flash Lite Image) is focused on speed and cost. It is not optimized for multiple reference inputs or multi-turn sequential editing, so it may struggle with the nuanced lighting calculations required for realistic glass reflections.

Always verify the specific capabilities available on the platform you are using, as website features may differ from the underlying model documentation. By tailoring your prompts to the specific strengths of the model and the type of glass effect you desire, you can consistently generate high-quality product imagery that rivals professional photography.