I’ve created a brand new blank level and the problem still persists. I didn’t even have a material assigned to the landscape yet and the overdraw/shader complexity was tiling in and out in chunks.
I assigned a new landscape material with only a single texture and the problem was still the same.
My first example was relatively simple with only 4 different landscape textures on a single landscape layer. The foliage has some overdraw, but it was still in the green. The landscape itself is the issue here. The tiling only exists on the landscape.