k3d/share/shaders/k3d_brick.sl:14: *    brickcolor, mortarcolor	Pretty obvious (default is red bricks)
k3d/share/shaders/k3d_brick.sl:32:		  color mortarcolor = color "rgb"(.6, .6, .6);
k3d/share/shaders/k3d_brick.sl:133:  Ct = mix(mortarcolor, bcolor, w * h);
k3d/share/shaders/k3d_brick3.sl:14: *    brickcolor, mortarcolor	Pretty obvious (default is red bricks)
k3d/share/shaders/k3d_brick3.sl:41:	color mortarcolor = color "rgb" (.6,.6,.6);
k3d/share/shaders/k3d_brick3.sl:104:  Ct = mix (mortarcolor, bcolor, w*h);
k3d/share/shaders/k3d_ceramictiles.sl:32: *   mortarcolor - base color of the mortar
k3d/share/shaders/k3d_ceramictiles.sl:170:			 color mortarcolor = color(.5, .5, .5);
k3d/share/shaders/k3d_ceramictiles.sl:238:  color Cmortar = mortarcolor;
k3d/share/shaders/k3d_hextile.sl:18: *    mortarcolor - the color of the mortar (space between the tiles)
k3d/share/shaders/k3d_hextile.sl:51:	 color mortarcolor = color(.5,.5,.5);
k3d/share/shaders/k3d_hextile.sl:118:  Ct = (1-stain) * mix (mix (Ctile, scuffcolor, scuff), mortarcolor, mortar);
