F1 is created with NfDesign. The first image is the same as the editing screen of NfDesign. Usually the editing screen shows Phong-shaded objects. Orange-red lines represent control lattice of sub-division surfaces and green lines represent NURBS surfaces edges. These geometric entities can be changed to polygon meshes if necessary.
[SampleF]
The second is a rendering image. NfDesign makes it available to calculate rendering of Sub-division surfaces and NURBS surfaces without changing to polygons.