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Hi,
I just waited 18 hours for a 320 x 240 snapshot to render, and that doesn't
bode well for any larger sizes. Mostly it seems that an area light is what
slowed it down so much, but I'd appreciate it if some kind soul could
explain to me how to interpret the statistics that pov prints at the end of
a run, so I can understand how I might speed things up. I'm using
radiosity, and a saved photon map from a previous run.
Here's what I got:
Statistics for Orrery.pov, Resolution 320 x 240
----------------------------------------------------------------------------
Pixels: 77790 Samples: 299294 Smpls/Pxl: 3.85
Rays: 1916709 Saved: 4059 Max Level: 24/255
----------------------------------------------------------------------------
Ray->Shape Intersection Tests Succeeded Percentage
----------------------------------------------------------------------------
Blob 16563127 1082976 6.54
Blob Component 414964724 19817115 4.78
Blob Bound 1177489001 498256364 42.32
Box 79375558 30035034 37.84
Cone/Cylinder 120724632 76992925 63.78
CSG Intersection 96267462 32469328 33.73
CSG Merge 11742121 480810 4.09
CSG Union 26082309 2089961 8.01
Fractal 315767336 28621239 9.06
Height Field 59749281 29959847 50.14
Height Field Box 59749281 59635002 99.81
Height Field Triangle 92811896 29976415 32.30
Height Field Block 59759349 39016074 65.29
Height Field Cell 47903328 46412956 96.89
Isosurface 311928365 253040365 81.12
Isosurface Container 315506286 311930882 98.87
Isosurface Cache 375029 22959 6.12
Lathe 2124622 136523 6.43
Lathe Bound 2124622 237868 11.20
Plane 823273396 383136223 46.54
Prism 13479082 2201607 16.33
Prism Bound 54376708 33993342 62.51
Sphere 326642099 180434182 55.24
Sphere Sweep 138385042 3270646 2.36
Superellipsoid 66983595 9375622 14.00
Torus 10579384 1633723 15.44
Torus Bound 10579384 1969980 18.62
True Type Font 1338511 80381 6.01
Bounding Object 862690 144690 16.77
Bounding Box 9337975026 3204610846 34.32
Vista Buffer 27184827 18665289 68.66
----------------------------------------------------------------------------
Isosurface roots: 311927311
Function VM calls: 13539920339
----------------------------------------------------------------------------
Roots tested: 364414141 eliminated: 593946
Calls to Noise: 13563987641 Calls to DNoise: 61099180
----------------------------------------------------------------------------
Media Intervals: 24149072 Media Samples: 34447804 (1.43)
Shadow Ray Tests: 240890798 Succeeded: 19112185
Reflected Rays: 168618
Refracted Rays: 36645
Transmitted Rays: 862140
Priority queue insert: 318263
Priority queue remove: 90183
Gather function called: 1642579
Gather radius expanded: 755703
----------------------------------------------------------------------------
Radiosity samples calculated: 18092 (1.27 percent)
Radiosity samples reused: 1408326
----------------------------------------------------------------------------
Smallest Alloc: 9 bytes Largest: 16000008
Peak memory used: 150850311 bytes
----------------------------------------------------------------------------
Time For Parse: 0 hours 0 minutes 10.0 seconds (10 seconds)
Time For Photon: 0 hours 0 minutes 3.0 seconds (3 seconds)
Time For Trace: 18 hours 2 minutes 2.0 seconds (64922 seconds)
Total Time: 18 hours 2 minutes 15.0 seconds (64935 seconds)
Any help gratefully accepted.
--
Bill Hails
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Bill Hails <bil### [at] europe yahoo-inccom> wrote:
> Blob 16563127 1082976 6.54
> Blob Component 414964724 19817115 4.78
> Blob Bound 1177489001 498256364 42.32
Try manually bounding your blob with a tighter sphere or square.
The hitrate above is very low and that's because POV-Ray usually
creates very big boinding boxes for blobs (it's difficult to get
an optimal one, even though I don't know if it's impossible).
You can find an optimal box or sphere by rendering a semi-transparent
one around your blob and fine-tuning its location and dimensions until
it tightly fits the blob. Then just add a bounding box or sphere to
the blob with the same parameters.
> Fractal 315767336 28621239 9.06
> Lathe 2124622 136523 6.43
> Sphere Sweep 138385042 3270646 2.36
The same advice goes for these as well.
You can often fine-tune your area light to render slightly faster
by modifying its parameters (mainly the 'adaptive' value, but sometimes
even lowering the density of the pointlights). If the area light
is lighting only a limited section of your scene, try seeing if you
can make it a spotlight.
--
plane{-x+y,-1pigment{bozo color_map{[0rgb x][1rgb x+y]}turbulence 1}}
sphere{0,2pigment{rgbt 1}interior{media{emission 1density{spherical
density_map{[0rgb 0][.5rgb<1,.5>][1rgb 1]}turbulence.9}}}scale
<1,1,3>hollow}text{ttf"timrom""Warp".1,0translate<-1,-.1,2>}// - Warp -
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Warp wrote:
> Bill Hails <bil### [at] europeyahoo-inccom> wrote:
>> Blob 16563127 1082976 6.54
>> Blob Component 414964724 19817115 4.78
>> Blob Bound 1177489001 498256364 42.32
>
> Try manually bounding your blob with a tighter sphere or square.
> The hitrate above is very low and that's because POV-Ray usually
> creates very big boinding boxes for blobs (it's difficult to get
> an optimal one, even though I don't know if it's impossible).
Ah, I see it.
> You can find an optimal box or sphere by rendering a semi-transparent
> one around your blob and fine-tuning its location and dimensions until
> it tightly fits the blob. Then just add a bounding box or sphere to
> the blob with the same parameters.
>
>> Fractal 315767336 28621239 9.06
>> Lathe 2124622 136523 6.43
>> Sphere Sweep 138385042 3270646 2.36
>
> The same advice goes for these as well.
Yes, thanks.
>
> You can often fine-tune your area light to render slightly faster
> by modifying its parameters (mainly the 'adaptive' value, but sometimes
> even lowering the density of the pointlights). If the area light
> is lighting only a limited section of your scene, try seeing if you
> can make it a spotlight.
>
Spotlight is not an option, I'm afraid, but I'll take a look at 'adaptive'.
Thanks very much for your help.
--
Bill Hails
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