k3d/share/shaders/k3d_texblender.sl:159:    vector V ,D,badN,corr,dispDir,ndir;
k3d/share/shaders/k3d_texblender.sl:162:    dispDir=normalize( faceforward(normalize(Ng),I));
k3d/share/shaders/k3d_texblender.sl:163:    corr=Nf-dispDir;
k3d/share/shaders/k3d_texblender.sl:185:			ndir=normalize(corr+Displace(dispDir,"shader",disp,0));
