How to Create 3D "Nano Banana" Figurines for Free — + Free Code (Three.js)

Published: • Tags: AI, Gemini, Nano Banana, 3D, Three.js

Quick summary: Google’s Nano Banana (Gemini "Flash Image" variant) lets you turn photos into hyper-real 3D figurine-style images for free via the Gemini app / Google AI Studio. Below you'll find a step-by-step Nano Banana workflow (no code), a sample prompt you can paste, and a free code example (Three.js) to embed interactive 3D on your blog.

Important: Images created/edited with Gemini's Flash Image models often include an invisible SynthID watermark to mark AI-generated content.

1) What is "Nano Banana" (short)

"Nano Banana" is the popular nickname for Google’s Gemini / Gemini Flash Image capability that can convert photos into studio-quality 3D figurine images quickly and for free through the Gemini app or Google AI Studio. It became widely used for turning portraits and pets into collectible-style 3D renders.

2) Create a Nano Banana 3D figurine (step-by-step — no code)

1. Open Google Gemini / AI Studio: Visit Google AI Studio or open the Gemini app (your Google account may be required).
2. Upload a good photo: Use a clear, high-resolution portrait with neutral background if possible.
3. Select the Nano Banana / Flash Image model: Choose the Gemini 2.5 Flash Image / Nano Banana option or the "3D figurine" style if available.
4. Paste a prompt: Use a detailed prompt (example below). You can tweak clothing, style, base, packaging, or scene and re-run until satisfied.
5. Generate and download: Wait a few seconds for generation, then download the image output or take further edits within the studio. Many guides confirm the process is free and fast.

Sample Nano Banana prompt (copy & paste)

Create a hyper-realistic 3D collectible figurine of the person in the uploaded photo, 1/7 scale, studio lighting, realistic plastic material, standing on a small clear acrylic round base, neutral white background, commercial toy packaging on the side (no text). High detail, natural skin texture, realistic shadows, full-body view.
  

Tip: If you want a specific pose, clothing color, or style (e.g., "wearing a blue denim jacket"), add that to the prompt and re-generate.

3) Free code option — create / display 3D in your blog (Three.js)

If you'd rather code, use Three.js (open-source JS library) to render 3D scenes directly in-browser. This example shows a simple rotating 3D cube — replace the cube with a glTF model exported from Blender or other tools.

Embed this in your Blogger post (switch to HTML view and paste):

<!-- Three.js simple embed -->
<div id="three-container" style="width:100%;height:480px;"></div>
<script src="https://cdn.jsdelivr.net/npm/three@0.156.0/build/three.min.js"></script>
<script>
const container = document.getElementById('three-container');
const scene = new THREE.Scene();
const camera = new THREE.PerspectiveCamera(60, container.clientWidth/container.clientHeight, 0.1, 1000);
const renderer = new THREE.WebGLRenderer({antialias:true});
renderer.setSize(container.clientWidth, container.clientHeight);
container.appendChild(renderer.domElement);

// Cube
const geometry = new THREE.BoxGeometry(1,1,1);
const material = new THREE.MeshNormalMaterial();
const cube = new THREE.Mesh(geometry, material);
scene.add(cube);

// Camera & light
camera.position.z = 3;
const light = new THREE.DirectionalLight(0xffffff, 0.8);
light.position.set(5,5,5);
scene.add(light);

// Resize handling
window.addEventListener('resize', ()=> {
  camera.aspect = container.clientWidth/container.clientHeight;
  camera.updateProjectionMatrix();
  renderer.setSize(container.clientWidth, container.clientHeight);
});

// Animation loop
function animate(){
  requestAnimationFrame(animate);
  cube.rotation.x += 0.01;
  cube.rotation.y += 0.01;
  renderer.render(scene, camera);
}
animate();
</script>
  

To show a 3D figurine model (instead of a cube), export a glTF (.glb) from Blender or a model conversion tool and load it with GLTFLoader — Three.js docs and tutorials show step-by-step examples.

4) Free alternative tools

• Blender — free, open-source 3D modelling/rendering; use it to fine-tune and export glTF models (steeper learning curve).
• Three.js — client-side library for web 3D (good for interactive embeds).
• Google Gemini / AI Studio — fastest no-code route to Nano Banana-style 3D figurines.

5) Tips for the best results

• Start with a high-quality, well-lit photo.
• Be specific in prompts (pose, clothing, base style).
• If you plan to 3D-print or commercialize, check licensing and rights for generated images.
• Use Blender + glTF export for realistic model control, then embed with Three.js for web display.

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