@rambobaby: That does not work for me.
I have a cube on layer 1.
I have a plane on layer 2.
I have a shadow casting sun on layer 3.
The cube sits on the plane and casts a shadow on the plane.
I want to see the cube in the 3D window, but not the plane and the light but when I render I want to see the plane and the shadow of the cube, but not the cube itself.
Now for the Render Layers setup.
TOP LAYERS BUTTONS:
I have layer 1 enabled.
BOTTOM LAYERS BUTTONS:
I have layers 2 and 3 enabled.
A blank blue screen, it does not work as you suggest, perhaps I am setting it up wrong?
Care to review my setup? I have been interested in this technique for a while, but never have I been able to achieve it.
renderlayer_tricks.blend (154 KB)