There are few demos about the rendering pipeline of the RenderingDevice. We'd better to add one. And there is also request for RenderingDevice manual page godotengine/godot-docs#9294

I have a MeshTextureRD demo that uses RenderingDevice to rasterize https://github.com/beicause/GodotMeshTextureRd/blob/main/MeshTextureRd.cs. I'm willing to port it to gdscript and polish and submit it to this repository. Please let me know your thoughts on this. 😉