anchor.diff:                                       diffuseFactor, specularFactor);
   
            ${vColors} = diffuseFactor * info.diffuseColor +
  -                      specularFactor * info.specularColor;
  +                      specularFactor * info.specularColor +
  +                      uColor;
           }
           """
         ]),
  
positive.code:           //color = packDepth(unpackDepth(color));
            gl_FragColor = color;
            // necessary?
            gl_FragColor.a = 1.0;
        }
        """
        ])
  
negative.code:                                      diffuseFactor, specularFactor);
  
           gl_FragColor = vec4(diffuseFactor * info.diffuseColor +
                               specularFactor * info.specularColor +
                               uColor, 1.0 );
        }
        """
        ])
  