k3d/share/shaders/k3d_lensflare.sl:19: *   starburstintensity - overall intensity of starburst effect (0=none)
k3d/share/shaders/k3d_lensflare.sl:90:		      float starburstintensity = 0.075;
k3d/share/shaders/k3d_lensflare.sl:155:    if(starburstintensity > 0)
k3d/share/shaders/k3d_lensflare.sl:163:	Cflare += star * (starburstintensity / intensity) / brightness;
