Question of the day: Shadow without shadow receiving object?

Question of the day: Shadow without shadow receiving object?

I've got two objects, where object A would throw a shadow on object B. It's simple as that.

How can I render object A's shadow on a transparent background - without object B actually being visible in the rendering output? I figured out how to render objects A's shadow without object A being actually visible by using a rendering tag, but got stuck with the question above.

Any ideas?

not sure I understood what you mean but you can try to put the new Shadow material on your object B.
If object A is a pig, object B a plane and you have some kind of background in you camera (color, image or hdri) you end up with something like this:
shot1 - pig+hdri+plane with standard material
shot2 - pig+hdri+plane with shadow material
you need Cheetah 5.x for this. hope it helps...

cheers,
A

Ok, found the answer

Found the answer here guys.
http://www.cheetah3d.de/forum/showthread.php?t=4615

Thanks SurfingAlien for your answer too!