It just came to me..
white plane
no_image objects
orthographic camera above the scene
save the image and image_map it onto a box, make white transparent
remove plane, no_image and move camera to original position.
Now the image_map would be the shadows right?
Haven't tried it out, but I imagine it could do the trick?
If not, the white box is the way..

--
Peter
http://hertel.no/peter

> Ok I made a pic with an all white background by making the actual
background
> white. I also added an infinte plane that is white with an ambient of .4
as
> a floor. I did this because I wanted the objects I placed in the scene to
> have shadows on a floor but still have the floor indistinguishable from
the
> sky. My first problem is that ambient .4 really lightens up the shadows
but
> if I lower the ambient the horizon becomes visible. My other problem is I
> want to make this pic alpha transparent. When I do so the white background
> becomes transparent but the floor doesn't. Is there a way I can give the
> floor a no_image tag or something similar but still let shadows be cast on
> it.
>
> Thanks
> Corey
>
>

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