I'm genrating a bezier surface using a control grid of these points:
(0,0,0) (1,0,0)
(0,1,0) (1,1,1)
And the surface should be equal to z = xy. My rendering lies on z=xy, but doesn't extend to two of the control points.
But, if I have a bezier surface derived from a control net of only four points, the surface should touch all those four points, right?