[Radiance-general] Mirror, Illum

[caria.roberto at tiscali.it]

Dear users,
I have some problem about mirror (light shelf) and illum.
I create my scene by Rhino be careful to surface normal (normal 
glass 
inward) and properties of mirror surface:
some object are:

void glass float
0
0
3 0.958 0.958 0.958 

float polygon object_1.1 (I have a few object as poligon that 
represent glass surfaces)
0
0
9
     67.7750015259      0.52999997139                7.5
                67      0.52999997139                7.5
                67      0.52999997139      8.10000038147

light shelf:

void metal aluminium
0
0
5 0.88 0.88 0.88 0.8 0.02

void mirror light_shelf
1 aluminium
0
3 0.704 0.704 0.704

ceiling:

void plastic material1
0
0
5 0.5 0.5 0.5 0.02 0.05

void mirror ceiling
1 material1
0
3 0.01 0.01 0.01 

sky:

!gensky 09 21 16 -a 44.30 -o 11.21 -m -15 -c -B 0.5587 

skyfunc glow skyglow
0
0
4 1 1 1 0

skyglow source sky
0
0
4 0 0 1 180

skyfunc glow groundglow
0
0
4 1 1 1 0

rpict:

rpict -vf view1.vf -i -ab 3 -aa 0.30 -ar 512 -ad 1024 -as 512 -dr 2 
-
x 2400 -y 1800 -t 30 scene/scene1.oct | pfilt -1 
-x /3 -y /3 > picture/view1.pic

falsecolor:
falsecolor -i picture/view1.pic -log 2 -s 7 -n 10 -l DF > 
picture/view1_df.pic

ra_tiff:
ra_tiff picture/view1_df.pic tif/view1_df.tif



Questions are:  
why are there some different color splotches on the bottom of the 
wall (view1_without ls) and a poor picture in general?
why the DF value on the floor is worse than simple scene if I use a 
light shelf? I get the same result with sun.     
using a clear sky with sun the windows on the other side of the sun 
provides a low light (maybe is there a problem with a diffuse 
illumination of sky?)       
I tried to use illum function but when I use rpict I get the 
following message:

warning - aiming failure for light source "object_270.270".

I created illum with following comands:

void glass float
0
0
3 0.958 0.958 0.958 

skyfunc brightfunc window_dist
2 winxmit winxmit.cal
0
0  

window_dist illum float2
1 float
0
3 .88 .88 .88

float2 polygon object_1.1 (more objects created by Rhino)
0
0
9
     67.7750015259      0.52999997139                7.5
                67      0.52999997139                7.5
                67      0.52999997139      8.10000038147


Thanks in advance
Roberto















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