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> I'm rendering a Gazebo, 

What is an Gazebo?

> and I want it to be in bright Dallas 
> sunshine.  So, one light source in the right spot, and yow, 
> the contrast is too high.  The shadows are too dark.  Yea, 
> it really does look like that, but the eye adjusts as you
> look around.  I tried turning up the ambient light setting 
> but it doesn't look good.  I threw in a fill-light with 
> "shadowless" and it does help.

You should use radiosity,
for a quick test just add at begin of .pov scene:

  global_settings{radiosity{}}

and probably You also would like to add:

 default{finish{ambient 0}}

then all (most) object would be lighten not only by light_sources, by also 
by sorounding objects that reflect (diffuse) light.

Light will be "produced" by ambient objects (including sky_sphere) and 
objects with i.e. finish{ambient 1}

You also my try HDRI instead sky_sphere (You need ML POV patch instead of 
Pov 3.6 for it).

In addition You might want to use area_light.
For radiosity You might want to use higher quality settings in final 
render.


-- 
http://www.raf256.com/3d/
Rafal Maj 'Raf256', home page - http://www.raf256.com/me/
Computer Graphics

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