[Radiance-general] multiple modifications to sky definitions

[Dave Bosworth]

Hello All-

I have been trying out Simon Crone's beautiful sky images, and can't find the right syntax to map both illuminance distributions and these images to a sky source.

Simon advises:
"These sky environments do not deal with any sky illuminance
distributions as they are simply mapped colour images.  You can 
use gensky etc. to further modify these sky environment."

so, how can I combine:

void colorpict sky_map
7       red green blue midday.pic  skymap.cal map_u map_v
0
1	.5

sky_map glow sky_mat
0
0
4  1 1 1 0

sky_mat source sky
0
0
4  0 0 1 180

with:

!gensky 4 1 +12.00 -i -a 42.44 -o -76.5 -m 300

skyfunc glow sky_mat
0
0
4   1 1 1 0

sky_mat source sky
0
0
4  0 0 1 180

I gather  this is a problem of applying multiple modifications to a single composite material?

thanks a lot!

Dave Bosworth
Cornell University
Ithaca New York