message: BRDF explorer app: partialy fixed oren-nayar
diff: @@ -30,7 +30,7 @@ float oren_nayar(in float _a2, in vec3 N, in vec3 L, in vec3 V, in float NdotL,
  vec3 view_plane = normalize(V - cos_theta.y*N);
  float cos_phi = max(0.0, dot(light_plane, view_plane));//not sure about this
  - return cos_theta.x * (AB.x + AB.y * cos_phi * C) / 3.14159265359;
  + return (AB.x + AB.y * cos_phi * C) / 3.14159265359;
  }
  #endif
  