Hello Lisa! Incorporating ice cubes or water to your oven can definitely help with crust development (specially when baking sourdoughs!). While it is not Unquestionably important, it can assist produce a beautiful loaf. Here is a bit more info on the process: Baking bread with steam Happy Baking! I chose https://archerzyvsp.bloguetechno.com/sourdough-pizza-dough-fundamentals-explained-63700217