--- libgender/fsh.cg	2004/10/05 08:13:01	1.5
+++ libgender/fsh.cg	2004/10/05 08:14:21	1.6
@@ -30,9 +30,9 @@
    float3 Vn = normalize(IN.WorldView);
    float3 Hn = normalize(Vn + Ln);
    // scalar product between light and normal vectors:
-   float ldn = dot(Ln,Nn);
+   float ldn = abs(dot(Ln,Nn));
    // scalar product between halfway and normal vectors:
-   float hdn = dot(Hn,Nn);
+   float hdn = abs(dot(Hn,Nn));
    // specialized "lit" function computes weights for
    // diffuse and specular parts:
    float4 litV = lit(ldn,hdn,SpecExpon);