Lowering Terrain Below Base Line

Hello! I have created my own custom terrain in Unity, and I decided to make a riverbed after I made my terrain. Unfortunately, it seems I cannot do that. There are many different tricks in Unity, so I was wondering if someone could please share with me how to lower terrain beyond the base line. Thanks!

Hello @TheUltimateRealDude1 , check out this thread for a possible solution: Unable to lower Terrain after terrain creation

Hope it helps!

Hello! Thanks for this, though unfortunately it completely flattened out my terrain. I’m looking for something that allows me to lower my terrain without changing the already made environment.