Vertical Lines showing up when stretching clipping plane

I stretched my clipping plane and it keeps showing these vertical lines and I don’t understand what I’m doing wrong. Is there any advice on what I should do so that they don’t show up?

Hi -

That screenshot doesn’t tell me if there is anything wrong.
Please run the Rhino SystemInfo command and copy-paste the result here and then we’ll take it from there.
-wim