That is a pretty cool bulb, and the way the glass and phosphors look viewed 
from nearly parallel to the bulb surface is quite accurate (though the glass 
could be a touch thicker).

I feel your pain with those render times...I've got a scene thats been going 
for over two days now and is 12% complete at 1024x768... :-(

Granted, I'm using media in the water, media clouds, isosurfaces and 
radiosity (media on)...

ian

"Cousin Ricky" <ric### [at] yahoocom> wrote in message 
news:op.### [at] your-727a0a4e7cvipowernetnet...
> Trying to whip up a spiroform compact fluorescent light bulb, all seemed
> well until I flicked on the high ambient and radiosity.  It took freakin'
> 4 hours for a little 320x320 swatch!
>
> ______________________________________________________________________
>
> Scene Statistics
>   Finite objects:          562
>   Infinite objects:          1
>   Light sources:             6
>   Total:                   569
>
> Render Statistics
> Image Resolution 320 x 320
>
> Pixels:           117663   Samples:          260097   Smpls/Pxl: 2.21
> Rays:           25682366   Saved:           2994586   Max Level: 15/15
>
> Ray->Shape Intersection          Tests       Succeeded  Percentage
>
> Box                           12167475         6235321     51.25
> Cone/Cylinder                 52542338        26269426     50.00
> CSG Intersection              19066704        10143355     53.20
> CSG Union                     15876905        15818031     99.63
> Plane                         42394448        12473732     29.42
> Sphere                        34522020        32168741     93.18
> Sphere Sweep                  62860863        30115671     47.91
> Torus                         31929828         8356481     26.17
> Torus Bound                   31929828         9443106     29.57
> Clipping Object               25660773         7068664     27.55
> Bounding Box                 921869187       436347103     47.33
> Light Buffer                  11780860         6728420     57.11
> Vista Buffer                   2208478         2144762     97.11
>
> Function VM calls:               88
>
> Roots tested:             217585910   eliminated:                43232
> Calls to Noise:                3544   Calls to DNoise:           36760
>
> Shadow Ray Tests:          34071387   Succeeded:               8334916
> Reflected Rays:             9021048   Total Internal:               17
> Refracted Rays:             7998251
> Transmitted Rays:               970
>
> Radiosity samples calculated:            42010 (9.07 %)
> Radiosity samples reused:               421288
>
> Smallest Alloc:                  18 bytes
> Largest  Alloc:               92896 bytes
> Peak memory used:           8283571 bytes
> Total Scene Processing Times
>   Parse Time:    0 hours  0 minutes  1 seconds (1 seconds)
>   Photon Time:   0 hours  0 minutes  0 seconds (0 seconds)
>   Render Time:   4 hours  7 minutes 38 seconds (14858 seconds)
>   Total Time:    4 hours  7 minutes 39 seconds (14859 seconds)
> CPU time used: kernel 946.48 seconds, user 11311.77 seconds, total
> 12258.25 seconds
> Render averaged 8.35 PPS over 102400 pixels
>
> ______________________________________________________________________
>
> #include "rad.inc" version 1.1-2006nov11.  Radiosity is ON.
> radiosity
> {  brightness 1.000
>    count 200
>    error_bound 0.450
>    normal on
>    pretrace_end 0.01000
>    pretrace_start 0.080
>    recursion_limit 1
> }
> ______________________________________________________________________
>
>
> Incredibly, POV-Ray seems to have been granted only 82% of the CPU.  I
> suspect that the remainder was dominated by my Web browser being kicked
> around by ad requests and YouTube pulls.  However, my Internet connection
> is so capricious that I really hesitate to close any windows, especially
> YouTube.  (When it takes an hour to download a 4 minute video--and this
> after several attempts spanning hours--you don't want to let it go.)
>
> Normal is on because it defaults that way in my include file.  I could
> have sworn I'd changed it.  In any case, I don't think it make much, if
> any, difference for this scene.  Radiosity notwithstanding, I suspect that
> the real slowdown was in the sphere_sweep:
>
>    Spiral form with radiosity      12258 seconds (3:24:18)
>    Spiral form without radiosity     736 seconds (0:12:16)
>    Dummy shape with radiosity         82 seconds
>    Dummy shape without radiosity       6.25 seconds
>
> Ratios of spiral to dummy were 150:1 and 118:1.
> Ratios of radiosity to non were 17:1 and 13:1.
>
> That it took 12 minutes *without* radiosity should have been a tip-off.
>
> Another slowdown may have been in my attempt at limb-darkening, which
> involved refraction and a near-duplication of the tubing.  While the
> real-life effect far exceeds the dynamic range of the typical CG image, it
> is noticeable enough in real life that a saturated CG render looks flat
> and unnatural.  (I didn't do a controlled timing test of that feature
> because of the trouble it would take to dismantle it; I may do it later.)
> The second attachment is welder's-eye view mock-up (the lighting is all
> staged) of the effect that I'm trying to achieve.
>
> -- 
> <Insert witty .sig here>

Post a reply to this message