Okay, creating a full Roblox lookalike is a massive undertaking, but we can build a very basic 3D environment with a controllable character using JavaScript and the Three.js library. This will give you a starting point.

This version will feature:

• A simple 3D world with a ground plane.
• A basic character representation (a cube).
• Keyboard controls (WASD or arrow keys) to move the character.
• No chat functionality.

Next steps:

1. Run npm install to install the dependencies (three and vite).
2. Run npm start to launch the development server.

You should see a simple 3D scene with a red cube that you can move around on a green plane using the WASD or arrow keys. The camera will follow the cube.

Okay, let's replace the solid green color with a repeating grass texture on the ground plane.

We'll use THREE.TextureLoader to load a grass image and apply it to the ground material.

The ground should now display a repeating grass texture instead of the solid green color.