While developing a very large ocean for my game I had flickering issues (Using a single plane at a scale of 100000 in all axis with the standard ocean material with some adjustments for scale). I solved this by creating my own mesh instead of using the standard plane. I created a plane in blender and subdivided it many many MANY times to get it up to 65k-ish in vertices. (You can right click a plane and hit subdivide in face mode to make this process very quick)
1 Like