[Radiance-general] Making a material invisible

[WA Bont]

Hello,

for speeding up different renderings of a sunshading device it's very easy to switch the material of the device and see what is the impact (like changing color, trancemittance and so on). but...

i also want to make one rendering without this sunshading device and i don't want to make changes in the drawing. so i want to make it invisible!

i've tried the following materialsettings:

# invisible: invisible : test
# 0
void interface invisible
0
0
8 1 1 1 1 1 1 1 1

and 

# invisible2: invisible2: test2
# 0
void trans invisible2
0
0
7 1 1 1 0 0 1 1

but if i'm comparing the results (with findglare and glarndx) after removing the sunshading device the results are all slightly different. what is a good way to simulate an invisible material, without interfering the sun and light?

thanx in advance
with regards,
Waldo Bont

Student at the University of Technology Delft, Civil Engineering, Building Physics.
Employee at engineeringcompany moBius consult