"folkert" <fol### [at] vanheusdencom> wrote:
> Now the main room (render the test.pov for that) is rather dark. Much darker
> then  it was in reality. Of course I could add an extra light just before the
> window but that's faking it too much.

With your Sun directly overhead, the only illumination inside the room comes
from the sky_sphere.

> What would be the solution?

If you wish to rely only on light that comes from outdoors, this may be
difficult.  The human eye has a fantastic ability to adjust to low light levels,
and what looks to you like a brightly lit room is actually very dark compared to
outdoors.

- Set global_settings { assumed_gamma 1 }.  This should be as automatic as
breathing.

- Use a brighter sky_sphere pigment.

- Alternatively, you can surround your scene with a huge sphere, and apply your
sky pigment with a high finish { ambient } to the sphere.

- Move the Sun so that it shines through a window.  The illumination of the
floor or a wall will give radiosity something more to work with.  Note that you
will not see the sunbeam shining into the room (unless you use media).

- Use high dynamic range illumination (HDRI).  HDRI is available in POV-Ray 3.7,
and documentation is available at the MegaPov Web site:
   http://megapov.inetart.net/manual-1.2.1/tutorials_hdri.html

P.S. A recursion_limit of 5 greatly slows down the render with little or no
visual benefit.

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