I used mkillum yesterday and bingo!!! got some better results, that I am trying to validate.
One question though, I just need to be certain that there is no ambient light in my results.
so to check, I am using the following for mkillum and then rtrace:
mkillum -I -h -dp 2046 -ar 32 -ms 0.063 -ds .2 -dt .05 -dc .75 -dr 3 -sj 1 -st .01 -ab 0 -aa .1 -ad 512 -as 256 -av 0 0 0 -lr 12 -lw .0005 -af scene2.amb scene2.oct < window.rad > mkwin2.rad
rtrace -I -h -dp 2046 -ar 32 -ms 0.063 -ds .2 -dt .05 -dc .75 -dr 3 -sj 1 -st .01 -ae Zero_Ref -ab 0 -aa .1 -ad 512 -as 256 -av 0 0 0 -lr 12 -lw .0005 -af scene2.amb mkscene2.oct < mk1.pts > existing3.dat
I assume that by setting -ab 0 and -av 0 0 0 there should be no ambient calculation, and indeed, lookamb just returns the values from rtrace, rather than a data file for value, position etc.. I believe this is a good thing.
Your thoughts would be greatly apprecicated however.
thanks for that. I had tried it in the past but rtrace returns
values of zero!!
I was confused about this, until I remember that for a uniform, or overcast sky (the types I am testing), the sky is a glow source, which I believe is not tested in the direct calculation.
which means I am back to the drawing board.
You could probably replace your windows with illums
using mkillum and a higher -ab value. For your final
rtrace calculations you can use -ab 0 again and only
get the "direct" contribution of the window illum.
I have to admit that I don't know what causes your
problems and therefore this approche may fail as well.
On 22.09.2005, at 13:19, nick devlin wrote: