The Enhanced shaders were the result of a couple of requests to extend the orignal Color Balance and Color Merge shaders that are part of the “Pose and Shading Pack 2” that was sold at DAZ 3D and will eventually be posted here in their own package.
Enhanced Color Balance lets you tweak the individual color components of a sub-shader. It is most useful for adjusting texture maps that aren’t quite what you wanted. The original version used a slider, this version allows you to use a sub shader.
Enhanced Color Merge lets you build up a color from individual component channels, controlling the level of blending using another shader to get the value instead of a slider.