k3d/share/shaders/k3d_wallpaper.sl:15:#define CELLSIZE (1/NCELLS)
k3d/share/shaders/k3d_wallpaper.sl:49:                sctr = CELLSIZE * (scell + 0.5
k3d/share/shaders/k3d_wallpaper.sl:51:                tctr = CELLSIZE * (tcell + 0.5
