Transforming a shape

Hi guys!
Is there a way in RHino to transform a simple rectangular surface to this “loose” shape that has the same entry contol points like the rectangular one?


  • draw the rectangle with command Plane
  • change the degree of U and V both to 3 using ChangeDegree
  • enable control points using F10 or PointsOn command
  • select all but the corner control points
  • run the Scale2D command on the control points:
    • click in the middle of the rectangle as first reference point
    • click on the edge of the rectangle as second reference point
    • move mouse inwards to contract the location of control points.

I hope it is clear :smile:

Loud and clear!