I'm looking for help in creating a masked shader effect. It's to simulate 2 shaders on one object. There would be a base shader, then a second masked shader which would allow portions of the base the come through. A black-&-white mask would determine which parts of the base come through and which are used for the second shader. Anyone have any ideas? Thanks!

From the Top Shader choose Complex Shaders>MultiChannel Mixer. Then set one Source for one shader and the second Source to the other. Stick your texture map or whatever in the Blender. That's it.

This should do it... You can use any black and white or grayscale image to do the mixing. And, to make matters more interesting, you can have multi-channel mixers inside of each other. Kind of makes the imagination wander a little. :D Mark

The texture channels are amazing.Spend some time on the operators...they are you friends:) I just wish I had a brush.

No need to think outside the box....
    Just make it invisible.