here is patch to introduce a mesh based (hermiteLevel!=0) flat cartoon style. It can be activated with 'set cartoonFlat true;'. It is useful for renderers other then Jmol's g3d such as POVRAY or WEBGL, either for speed or artistic reasons. Nevertheless it is also quite fast with Jmol's g3d.
* gaps at cartoon arrows
* non helix/sheet sheets should probably rotated by 90 deg