k3d/share/shaders/k3d_shiny.sl:10: *    twosided - if nonzero both sides of the surface are shiny, otherwise
k3d/share/shaders/k3d_shiny.sl:35:		  float twosided = 0;)
k3d/share/shaders/k3d_shiny.sl:39:    MaterialShinyMetal(Nf, Cs, Ka, Kd, Ks, roughness, Kr, blur, twosided,
k3d/share/shaders/k3d_shinyplastic.sl:11: *    twosided - if nonzero both sides of the surface are shiny, otherwise
k3d/share/shaders/k3d_shinyplastic.sl:30:			 float twosided = 0;
k3d/share/shaders/k3d_shinyplastic.sl:36:			 twosided, ENVPARAMS);
k3d/share/shaders/k3d_softboxes.sl:10:* To do: accomodate negative widths. twosided/onesided cards.
