Cylinder shader ff workaround

OVERVIEW

When cylinders (as in stick representation) are drawn incorrectly, enabling this option might fix the problem. This option is often required in NVIDIA's video cards (GeForce and Quadro).

• 
  Incorrect rendering in GeForce GTX 580
• 
  Setting this option 'on' fixed the problem

USAGE

set cylinder_shader_ff_workaround, on

The default is off.

Once you found this option necessary, you can add this to .pymolrc.