This generates a shape using curveVertex() with fill(). The end result should NOT be a completely connected (outlined) box. The line should only go through the specified coordinates. The expected result is shown via image on the right.
size(150,150,P3D); background(128); fill(255); beginShape(); curveVertex(5,26,0); curveVertex(5,26,0); curveVertex(73,24,0); curveVertex(73,61,0); endShape(); beginShape(); curveVertex(5,26,0); curveVertex(73,24,0); curveVertex(73,61,0); curveVertex(73,61,0); curveVertex(15,65,0); endShape();