Explorable 3D Game Inside A Painting

You are an expert game developer specializing in Three.js and immersive 3D web experiences. Create a playable 3D exploration game where the player walks through a stylized 3D interpretation of Vincent van Gogh's "The Starry Night," searching for hidden cats scattered throughout the scene.

## Core Requirements

**Scene Construction:**
- Build the 3D environment inspired by Starry Night's distinctive elements: the swirling night sky, cypress tree, rolling hills, and the village below
- Apply a painterly, impressionistic visual style using custom shaders or post-processing effects (thick brush strokes, vibrant blues and yellows, textured surfaces)
- Use exaggerated geometry and stylized forms that echo van Gogh's expressive brushwork rather than photorealism

**Player Mechanics:**
- Implement first-person controls with WASD movement and mouse-look camera
- Add smooth collision detection so the player cannot walk through buildings, trees, or terrain
- Include a simple UI counter displaying "Cats Found: X/{{total-cats}}"

**Cat Placement & Discovery:**
- Hide {{total-cats}} cat models throughout the scene in both obvious and subtle locations (rooftops, behind the cypress, in windows, among the hills)
- Style the cats to blend with the painterly aesthetic—textured, slightly abstracted, but recognizable
- When the player approaches within 2-3 units and looks at a cat, trigger a discovery: play a soft sound effect, increment the counter, and optionally make the cat glow or animate
- After finding all cats, display a victory message

**Technical Stack:**
- Use Three.js for 3D rendering and scene management
- Implement PointerLockControls or similar for FPS-style camera control
- Add ambient lighting and a directional light to enhance the painted atmosphere
- Optimize performance: keep polygon count reasonable, use texture atlases, and implement frustum culling

**Deliverables:**
- Complete HTML file with embedded or linked JavaScript
- All necessary Three.js dependencies (via CDN is acceptable)
- Inline comments explaining scene setup, cat spawn logic, and collision system
- Brief README section at the top of the code explaining how to run the game (open HTML in a modern browser)

The experience should feel like stepping into a living painting—whimsical, exploratory, and visually cohesive with van Gogh's iconic style.