genBSDF question

Hi all,

I am back with more questions about genBSDF. I have modeled a window with
venetian blinds on the lower part and translucent louvers on the upper part
of the window. I tried to run genBSDF with my geometry including the
blinds, louvers, glazing and the window reveal, but I did not get any
results back after 14 hours.

I know genBSDF runtime is long, but I wonder if I am doing something wrong,
or if I could change anything in my model that could make genBSDF run
faster.

Attached are the geometry files. Here is what I typed:

genBSDF -n 12 +f +b -geom meter -t4 5 reveal_glazing.rad venetian80.rad
LChazed.rad > bsdf/v80_hazed_t45.xm

Best,
Leyla

reveal_glazing.rad (2.93 KB)

venetian80.rad (129 Bytes)

LChazed.rad (138 Bytes)

Hi Leyla,

All you can really do is play with the -c option and the rendering parameters. You probably don't want to change -c in this case, but you can make the rendering go faster by altering the default options, which are:

  "-w -ab 5 -ad 700 -lw 3e-6"

You can try running:

  genBSDF -n 12 +f +b -geom meter -t4 5 -r "-ab 3 -ad 500 -lw 1e-5" \
    reveal_glazing.rad venetian80.rad LChazed.rad > bsdf/v80_hazed_t45.xml

Also, I noticed that your blind slat material has 10% specularity, which probably isn't realistic unless it has a metallic coating. I would expect the specularity to be 0.05 or less. You are also better off specifying a non-zero roughness value unless the slats are really mirror-smooth.

Cheers,
-Greg

···

From: Leyla Sanati <[email protected]>
Date: September 17, 2013 4:02:53 PM PDT

Hi all,

I am back with more questions about genBSDF. I have modeled a window with venetian blinds on the lower part and translucent louvers on the upper part of the window. I tried to run genBSDF with my geometry including the blinds, louvers, glazing and the window reveal, but I did not get any results back after 14 hours.

I know genBSDF runtime is long, but I wonder if I am doing something wrong, or if I could change anything in my model that could make genBSDF run faster.

Attached are the geometry files. Here is what I typed:

genBSDF -n 12 +f +b -geom meter -t4 5 reveal_glazing.rad venetian80.rad LChazed.rad > bsdf/v80_hazed_t45.xm

Best,
Leyla

Thank you Greg. I'll try that.

Leyla

···

On Tue, Sep 17, 2013 at 8:00 PM, Greg Ward <[email protected]> wrote:

Hi Leyla,

All you can really do is play with the -c option and the rendering
parameters. You probably don't want to change -c in this case, but you can
make the rendering go faster by altering the default options, which are:

"-w -ab 5 -ad 700 -lw 3e-6"

You can try running:

genBSDF -n 12 +f +b -geom meter -t4 5 -r "-ab 3 -ad 500 -lw 1e-5" \
reveal_glazing.rad venetian80.rad LChazed.rad > bsdf/v80_hazed_t45.xml

Also, I noticed that your blind slat material has 10% specularity, which
probably isn't realistic unless it has a metallic coating. I would expect
the specularity to be 0.05 or less. You are also better off specifying a
non-zero roughness value unless the slats are really mirror-smooth.

Cheers,
-Greg

*From: *Leyla Sanati <[email protected]>

*Date: *September 17, 2013 4:02:53 PM PDT

*
*

Hi all,

I am back with more questions about genBSDF. I have modeled a window with
venetian blinds on the lower part and translucent louvers on the upper part
of the window. I tried to run genBSDF with my geometry including the
blinds, louvers, glazing and the window reveal, but I did not get any
results back after 14 hours.

I know genBSDF runtime is long, but I wonder if I am doing something
wrong, or if I could change anything in my model that could make genBSDF
run faster.

Attached are the geometry files. Here is what I typed:

genBSDF -n 12 +f +b -geom meter -t4 5 reveal_glazing.rad venetian80.rad
LChazed.rad > bsdf/v80_hazed_t45.xm

Best,
Leyla

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