How make fake 3d fps game?

Hi, i need help to create raycasting fake 3d fps game, i am noob in math and i search more informations to do it in gdevelop… if someone have exemple or councils, thank you :wink:

Here you go:

The question is why would you want to use Gdevelop, a dedicated 2D engine, for a 3d fps game (fake or not)? There are certainly better options out there.

thank you good job , i will look that and try understand better :wink: