Is there a special node that we can use to make infinite terrain in Godot 4? Do we have to do it ourselves with code or do we have to use plugins? I watched this video and do I have to do this process again with the same codes? Does anyone have an idea?
[

    unicornlox Do we have to do it ourselves with code or do we have to use plugins?

    Yes. One or the other or both of those. There isn't a built-in 3D terrain implementation in Godot, but there are a lot of solutions out there. If I were you, I would find a tutorial. This video you linked is just a showoff with some high-level how-to. If you are not already familiar with the concepts, you will not be able to understand it. Look for a 3D terrain tutorial that explains everything from the bottom up.

        Godot doesn't have a built-in support for terrains. Try this plugin. There are plenty of free tutorials on YouTube.

          Fencer I think I need to learn and do this myself, I am using godot 4.1 mono c# in my project and this plugin will not work for me.Thank you very much for your reply.

            Tbh the method shown in that video is rather simple. It doesn't involve any dynamic mesh creation or chunk management. It's basically just running a displacement vertex shader on a pre-made mesh, and sliding the texture in accord with player movement. It'd amount to less than 100 lines of code, including the shader.