8K empty landscape cost large memory and drawing millions of triangles

I had a test for 8K landscape, the level just contains an 8K landscape and a directional light, both of which work in world partition with default settings. The result of “stat RHI” is that the level takes more than 6G GPU RAM and has more than 100w+ triangles drawn(Nanite is useful for reducing the number of triangles drawn, but it isn’t work for 8K landscape, Nanite Landscape is Broken on 5.3? Cannot Save Project with Nanite on Landscape. ). How to reduce these?
A lot of thanks!

Any body helping?

The “LOD Distribution” setting of the Landscape adjusts the number of triangles drawn. Try not to adjust the “LOD 0 Screen Size”, or your character might float in the air or sink into the ground on the slope. Since the level of detail of the Landscape in the distance is not important, the value of “Other LODs” can be reduced.
I’m still looking for ways to reduce GPU memory consumption.