Use W,A,S,D to move. Arrow Keys to Turn left and right. It's 3D version of List RayCaster. I Recommend using TurboWarp for FPS: https://turbowarp.org/635452565?hqpen This Raycaster doesn't use and sprites collisions, it uses complicated math.
This project would not exist without this video: https://www.youtube.com/watch?v=TOEi6T2mtHo I have converted his script to scratch script. And made it 3D. ***New*** Play Realist Light version here: https://scratch.mit.edu/projects/655151996/