[Radiance-general] Uniform sky

[Vera Liu]

Hi Radiance experts,
I want to get the ground truth pixel values of a scene generated by
radiance and I figured the best way is to use a uniform sky where the sky
it's 1,1,1...everywhere. The way I'm currently using is by specifying a sun
!gensky 4 1 12 +s -a 40 -o 98 -m 105
skyfunc glow sky_glow
0
0
4 1 1 1 0
sky_glow source sky
0
0
4 0 0 1 180

This results in shadows in the final scene. I found that -u option or -c
option can give me a uniform cloudy sky and maybe give me the ground truth
values. I tried both of them but always get 'no lighting source warning'
and a very dark scene when I try to use rpict and pfilt on the .oct
generated. I think I might be understanding something wrong. Could you
please give me a hint on this? The two options I tried are:
!gensky 3 20 12 -a 40 -o 98 -m 105 -u -B 100
and
!gensky -ang 45 0 -c -b 1

Thank you very much!
Best,
Vera
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