What exactly do you want to make? 
There are some limitations on the extension that could get in the way, depending on what you mean:
- The extension does not include 3D floors/ceilings, although other extensions can add that
- The raycasting extension can only make flat walls, ceilings, and floors; You couldn’t have things like obstacles to jump over or pits to fall into.
With a more specific description of what you need, I think I could try using the height of the player to make platforms to jump between 