[Radiance-general] ambient light

[Bei Xiao]

Hi, 
 I am using Radiance to simulate objects with various glossy  parameters. 
But I found no matter how did I set up the material properties of the 
objects, they all look the same under the light. I guess there must be 
too much ambient light so the highlights on the objects are invisible. I 
want to turn off the ambient light in the scene and only keep a few area 
light sources. How shall I set up the parameters? Also, how do I include these parametesr in the .rad file? 
thanks. 


Bei