bg3d

Ok so I was trying to figure out how to do this with @nomand.  When you have UV’s set up and don’t use projections, Layered Textures are pretty straight forward which you can just look up in Maya’s help files.

This is where we started  http://twitpic.com/7l9l1/full

Here’s a Tutorial on Highend3d which I find a bit confusing.

This is my hypershade shot on what has to be done.

middle mouse dragging in the hypershade and using the connection editor

1.  Your decal image outColor -> projection1.image

2. Then Projection1.image -> layeredTexture1.inputs[x].color.

3. Then duplicate your projection node and remap the place3dTexture node to it like the other one was.  worldInverseMatrix -> placementMatrix

4.Your Decal file outAlpha -> projection2.imageR

5. Then finaly take it from the projection2.outColorR -> layeredTexture1.inputs[x].alpha