How do I get rid of these lines when I zoom out?

[Nathaniel3W]

Zoomed in, this surface looks OK:


But zoomed out, this surface (which is made up of a bunch of static meshes) suddenly gets a lot of shadows along the edges.


How do I stop that? Thanks for taking a look.

[yummy-vegetables]

Try unchecking the cast shadows from the mesh's property.

[jpnuclear]

I think is a function to reduce memory, try to increase the scale for material, like some 4x. Waiting for the test