Hello there,
So I am still exploring VW2020 and how to do things properly. On my section viewports, unwanted diagonals appear on some of my walls or roofs, as if VW tried to triangulate them. On this issue, I have read other posts suggesting to un-join walls or to redo them, but it didn't helped me.
The image bellow was rendered in cartoon style with no other renders (not even lines or hidden lines). These problematic lines are not on the section plan and they cannot attract the cursor, they are really just generated by the cartoon render style.