I'm experimenting with irradiance cashing turned off, and would appreciate
any tips. In a test scene, I have some curious results where surfaces meet
at a corner or edge. See partial image here (note the short partitions
meeting the floor plane, you also see it along the roof structure
components):
Here are my rpict settings (most generated by rad program, overrides given
for ambient parameters):
-dp 4096 -ms 0.25 -ds .2 -dt .05 -dc .75 -dr 3 -ss 16 -st .01 -lr 12 -lw
1e-5 -ab 4 -aa 0 -av 0 0 0 -ar 800 -ad 3000 -as 1500 -ps 3 -pt .04
I'm guessing -ar doesn't matter, there may be some optimization tricks
between -ad and -as, and probably some really important variable I have
less of a grasp on...
I'm experimenting with irradiance cashing turned off, and would appreciate
any tips. In a test scene, I have some curious results where surfaces meet
at a corner or edge. See partial image here (note the short partitions
meeting the floor plane, you also see it along the roof structure
components): Dropbox - Error - Simplify your life
Here are my rpict settings (most generated by rad program, overrides given
for ambient parameters):
-dp 4096 -ms 0.25 -ds .2 -dt .05 -dc .75 -dr 3 -ss 16 -st .01 -lr 12 -lw
1e-5 -ab 4 -aa 0 -av 0 0 0 -ar 800 -ad 3000 -as 1500 -ps 3 -pt .04
I'm guessing -ar doesn't matter, there may be some optimization tricks
between -ad and -as, and probably some really important variable I have
less of a grasp on...
I'm experimenting with irradiance cashing turned off, and would appreciate
any tips. In a test scene, I have some curious results where surfaces meet
at a corner or edge. See partial image here (note the short partitions
meeting the floor plane, you also see it along the roof structure
components): Dropbox - Error - Simplify your life
Here are my rpict settings (most generated by rad program, overrides given
for ambient parameters):
-dp 4096 -ms 0.25 -ds .2 -dt .05 -dc .75 -dr 3 -ss 16 -st .01 -lr 12 -lw
1e-5 -ab 4 -aa 0 -av 0 0 0 -ar 800 -ad 3000 -as 1500 -ps 3 -pt .04
I'm guessing -ar doesn't matter, there may be some optimization tricks
between -ad and -as, and probably some really important variable I have
less of a grasp on...
Mike,
Out of curiosity, at what image size (pixels) are you rendering, and are you using pfilt to filter down to the final image? I believe rendering many extra pixels with lower –ad and filtering down by /5, /10, etc. is the typical approach for the sake of rendering time when setting –aa 0. I’m not an expert in this, just recalling things I’ve seen in the distant past. I wonder if this approach would also reduce the size of those rendering artifacts.
···
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Mark, thanks for the tip - I'll see how it goes. So much for what I thought
I knew about -ar... It turns out you can get a pretty nice -aa 0 rendering
with today's newer machines in about the same time a "traditional" run
(complete with sampling artifacts) would take on 7-8 year old hardware...
It's a bit of an apples to oranges test, but interesting to see
advancements in hardware performance reducing the need for indirect
calculation optimization.
Chris, it's a 3000px rendering pfilted down to 1000px. I'll test out a
larger resolution too and see if the artifacts scale with the increased
iamge size.
Thanks!
MM
···
On Tue, Jan 27, 2015 at 6:10 AM, Christopher Rush <[email protected] > wrote:
Mike,
Out of curiosity, at what image size (pixels) are you rendering, and are
you using pfilt to filter down to the final image? I believe rendering many
extra pixels with lower –ad and filtering down by /5, /10, etc. is the
typical approach for the sake of rendering time when setting –aa 0. I’m not
an expert in this, just recalling things I’ve seen in the distant past. I
wonder if this approach would also reduce the size of those rendering
artifacts.
____________________________________________________________
Electronic mail messages entering and leaving Arup business
systems are scanned for acceptability of content and viruses
Chris's points about smaller -ad and larger image size oversampling
are spot on. I ran some tests about a decade ago and found that very
large images with relatively low -ad (and -as) generated better
renderings for a given compute time. Results with images are here:
Mike,
Out of curiosity, at what image size (pixels) are you rendering, and are you
using pfilt to filter down to the final image? I believe rendering many
extra pixels with lower –ad and filtering down by /5, /10, etc. is the
typical approach for the sake of rendering time when setting –aa 0. I’m not
an expert in this, just recalling things I’ve seen in the distant past. I
wonder if this approach would also reduce the size of those rendering
artifacts.
____________________________________________________________
Electronic mail messages entering and leaving Arup business
systems are scanned for acceptability of content and viruses