Performance of Accelerad

lee · May 1, 2022, 8:07am

lee:

Then Accelerad is used in the sun coefficients part of 5 phase method. Its performance is OK and fast with a high ad but a low ab like this:
vwrays -vf $views/south.vf -x 900 -y 900 -pj 0.7 -ff | accelerad_rcontrib -i -ab 1 -ad 10240 -lw 1.0e-4 -dc 1 -dt 0 -dj 0 -ffc -n 1 \
    `vwrays -vf $views/south.vf -x 900 -y 900 -d` -o $hdrIllSpace/hdr$p-$q/%04d.hdr -e MF:6 -f reinhart.cal -b rbin -bn Nrbins \
    -m solar $octrees/glazing$p-$q/sun.oct

The output images of sun coefficients part are all black again. (The same problem mentioned in a former post: black image)

I removed ‘-w’ and there seems no error about the running of Accelerad.

The model is OK cause I once got normal images using Radiance. One image from sun coefficients part of the room model is like this:

What happend in the sun coefficients simulation?