how to eliminate the shadow or shadow halo beyond the image

[Gabik87]

Good morning everyone,
I want to reduce the halo of the shadow extends beyond the image format, so with a png image, in a background it is not beautiful!

What should I do to eliminate these shadow halos !?

Thanks

[INNEO_MWo]

You can:
a) render without shadows
b) render with shadows and a clown pass (or any other helpful pass) to clip the shadow of
c) render with a black background and transparency, so you don't get "whiten" shadows
d) render with a 50% grey background, so you'll get a good compromise between soft shadows and less halo
e) set all objects on a render layer

hope that helps


CheerEO
Marco