Distant objects clipping

Hi all.

I have a hemisphere acting as a Moon, it’s fairly far away and I’m getting a peculiar clipping effect. Any ideas on why this could be? It only happens when the model is far away.

218579-ue4editor-2017-10-31-21-35-03.png

218580-ue4editor-2017-10-31-21-34-51.png

Thanks.