[Radiance-general] Making a material invisible

[Raphael Compagnon]

The simplest way is to apply the modifier "void" to the invisible objects.

For instance this defines an invisible square:

void polygon invisible_square
0
0
12
         -1 -1 0
          1 -1 0
          1  1 0
         -1  1 0


At 26.09.2003 14:28, you wrote:

>  what is a good way to simulate an invisible material, without 
> interfering the sun and light?