Boarder

What is happen with my boarder? Erosion device is eating 2 sides of it … How can I can not prevent it from happening?

mask out the erosion with a second shape with no falloff. why do you want erosion in that scene anyway? i cannot load the file, could you instead post a screenshot of your device view??

Hmm It appears when I turn on erosion power and goes away when I turn it off