My Landscape isn't rendering updates

So I’m running into this problem whenever I paint the fourth layer from a custom material onto my landscape. After all the shaders finish up, I’m left with all these dark grey checkered boxes on my landscape that never change again… Can someone help out an Unreal Noob? :slight_smile:

You’ve run out of texture memory. Click on your textures and in the details change sampler source from the default to ‘shared: wrap’.