Split command distorting surface

I tried a drape surface (spacing 1-5) and then tried to split it with another surface. The draped surface is getting distorted after splitting. Tried to patch the surface instead of drape (from contours) and then tried to split. If i give low stiffness for patch and then create the surface. then split it, same problem. Please help

Hello - please check the display/render mesh settings, outlined here -

https://wiki.mcneel.com/rhino/meshfaq

And tweak to taste. Does that look better?

-Pascal