k3d/share/shaders/k3d_windowlight.sl:14: *   hpanes, vpanes - number of horizontal and vertical panes
k3d/share/shaders/k3d_windowlight.sl:36:		      float hpanes = 2, vpanes = 3;
k3d/share/shaders/k3d_windowlight.sl:71:    offset = (PL - center).right + panewidth * (hpanes / 2);
k3d/share/shaders/k3d_windowlight.sl:72:    if(offset > 0 && (offset / panewidth) < hpanes)
