Blending Coffee Cup Photos with Steam: Nano Banana 2 Image-to-Image Guide

Creating a realistic, steaming beverage photo often requires more than just a static image of a cup. You might have a perfect shot of a ceramic mug but need the dynamic motion of rising steam to make it feel fresh and inviting. This guide explains how to use Nano Banana (the AI image generation and editing tool) to integrate external reference images into your workflow. Specifically, we will focus on adding steam effects to a coffee cup photo using the robust capabilities of Nano Banana 2.

It is crucial to understand that Nano Banana refers strictly to the AI image tool described here. It is not a skincare brand, nor does it represent a physical bottle or jar. When you upload an image of a coffee cup, you are providing visual data for the model to interpret, not asking it to replicate a specific commercial product label. The prompt instructions describe desired outcomes, such as adding steam, but they do not guarantee the preservation of specific identity, labels, or typography from the original input.

Understanding Model Capabilities and Limitations

Before attempting to blend multiple elements like a coffee cup and steam, you must select the correct engine. Google documents Nano Banana 2 as Gemini 3.1 Flash Image (gemini-3.1-flash-image) and Nano Banana Pro as Gemini 3 Pro Image (gemini-3-pro-image). These models support advanced text-to-image and image-to-image workflows.

However, there is a distinct version called Nano Banana 2 Lite, which corresponds to Gemini 3.1 Flash Lite Image (gemini-3.1-flash-lite-image). Google describes Nano Banana 2 Lite as being focused on speed and cost efficiency. Crucially, it is not optimized for multiple reference inputs or multi-turn sequential editing. Attempting to blend an external coffee cup photo with a complex steam effect using the Lite version may result in poor integration or failure to recognize the secondary reference. Therefore, this tutorial specifically recommends using Nano Banana 2 or Nano Banana Pro for tasks requiring the integration of external references.

If you are unsure which version you are accessing, remember that the website has a dedicated Nano Banana 2 product page at /nanobanana2. While there is a page named Nano Banana Lite at /nanobananalite, the presence of that page does not automatically establish support for all Google Nano Banana 2 Lite features or identical capabilities found in the main Nano Banana 2 interface. Always verify the model name before starting a complex edit.

Step-by-Step Workflow for Steam Integration

To successfully add steam to your coffee cup image, follow these structured steps within the Nano Banana 2 interface. This process relies on the image-to-image workflow rather than simple text generation.

1. Access the Generator: Navigate to the Nano Banana 2 interface via the Try Nano Banana link. Ensure you are logged in and ready to start a new project.
2. Upload Your Reference: Locate the image upload section. Select your high-quality photo of the coffee cup. This serves as your primary visual anchor. The system will analyze the lighting, angle, and texture of the cup.
3. Configure the Prompt: In the text input field, describe the desired change clearly. Since prompts do not guarantee object preservation, be specific about what should remain and what should change. For example, state: "Keep the exact shape and color of the coffee cup, but generate realistic white steam rising from the top." Label any untested variations as examples if you are experimenting with different steam densities.
4. Adjust Settings: If available, adjust parameters related to creativity or adherence to the source image. Higher adherence settings help keep the cup looking like the original photo while allowing the AI to invent the steam.
5. Generate and Review: Click the generate button. Wait for the model to process the request. Once complete, review the output to see if the steam blends naturally with the existing lighting of the room.

Crafting Effective Prompts and Judging Results

The quality of your final image depends heavily on how you phrase your request. A usable prompt example for this task would be: "A close-up of a ceramic coffee cup with rich brown liquid. Add volumetric, soft white steam rising gently from the rim. Maintain the original background and cup design exactly."

Remember that prompt instructions describe desired outcomes; they do not guarantee identity, label, object, or typography preservation. If your cup has a logo, the AI might alter or remove it while generating the steam. This is a known limitation of the technology.

How to Judge Results

When evaluating the generated image, look for three key indicators:

• Lighting Consistency: Does the steam catch the light in the same direction as the objects in the original photo? Inconsistent lighting breaks realism.
• Edge Blending: Is the transition between the solid cup and the gaseous steam smooth? Hard edges suggest the AI failed to merge the layers correctly.
• Object Integrity: Did the cup retain its original shape and color? If the cup looks melted or distorted, the adherence setting was likely too low.

Troubleshooting Common Issues

If the steam looks disconnected or the cup changes unexpectedly, try the following fixes:

• Increase Adherence: If your interface allows, increase the weight given to the input image.
• Refine the Prompt: Be more explicit about keeping the cup unchanged. Use phrases like "preserve the cup geometry" or "do not alter the mug shape."
• Switch Models: If you accidentally used Nano Banana 2 Lite, switch to Nano Banana 2 or Nano Banana Pro. The Lite version lacks the optimization required for this specific multi-reference task.

By following these guidelines and understanding the distinctions between the available models, you can effectively use Nano Banana 2 to create stunning, steaming coffee imagery without relying on guesswork or unverified claims.