JavaScript must be enabled in order to use this site.Please enable JavaScript in your browser and refresh the page. To Place a B-spline Surface by Averaging Points Select the Planar Surface by Points tool ( Modeling > Surfaces > Create Surfaces > Construct Surface > By Plane ). Click the Averaging Plane by Points icon. Enter data points to define four or more points on the surface. Reset to create the surface. Parent topic: Planar Surface by Points