Gyscos <gys### [at] gmailcom> wrote:
> -> When a non-sun-like light source make a shafow, THIS shadow is black,
> only sun-like light source can have smooth shadow...

  On what do you base this assumption? It doesn't work like that in real
life.

> I considered using area_light, but the sun isn't really an area  from the
> Earth, and anyway that still leave hard shadows...

  Actually the Sun is not a point light. If you eg. photograph the sun
(with the camera set up so that you can see the disc of the sun, eg. by
using a strong filter) you see that it is a disc with a visible size.
Thus the sun is an area light.
  Moreover, the atmosphere scatters the light, and this effect is
especially strong when the sky is a bit cloudy. When the sun shines
from behind a cloud, all shadows are really smooth.

-- 
                                                          - Warp

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