On Wed, 6 Feb 2002 11:02:12 +0200, "Nekar Xenos"
<j-p### [at] citywalkcoza> wrote:

>I was wondering if anyone would be willing to help me out with rendering my
>cars. Progress is getting very slow as I can't get the 'big picture' because of
>outdated CPU's.

I tried a low-res test  with the following stats:


Statistics for C:\Programmer\POV-Ray for Windows
v3.5\scenes\Erkki\NekCar!F15.pov, Resolution 160 x 120
----------------------------------------------------------------------------
Pixels:           19880   Samples:           19880   Smpls/Pxl: 1.00
Rays:            567304   Saved:            117505   Max Level: 5/5
----------------------------------------------------------------------------
Ray->Shape Intersection          Tests       Succeeded  Percentage
----------------------------------------------------------------------------
Blob                          16740365         3984686     23.80
Blob Component               343911946        77591911     22.56
Blob Bound                   705855661       458233820     64.92
Box                         1041366216         8604640      0.83
Cone/Cylinder                 20203884          484078      2.40
CSG Intersection              38676006         3315345      8.57
CSG Merge                      6349794         1650976     26.00
CSG Union                     14431334         2407544     16.68
Disc                            259843          168419     64.82
Plane                          4106174         1324424     32.25
Sphere                         9236064           15470      0.17
Superellipsoid                 2886258           27235      0.94
True Type Font                13854040           29692      0.21
Clipping Object                2077608         2074324     99.84
Bounding Box                   2349398         1405991     59.84
Vista Buffer                     95208           95162     99.95
----------------------------------------------------------------------------
Roots tested:             13279974   eliminated:              408614
Calls to Noise:             610065   Calls to DNoise:        1975588
----------------------------------------------------------------------------
Shadow Ray Tests:           744810   Succeeded:               457012
Reflected Rays:             176132
Refracted Rays:                143
Transmitted Rays:           104106
I-Stack overflows:           25919
Number of photons shot:          44195
----------------------------------------------------------------------------
Radiosity samples calculated:       7147 (3.24 percent)
Radiosity samples reused:         213485
----------------------------------------------------------------------------
Smallest Alloc:                 25 bytes   Largest:            12056
Peak memory used:          4352603 bytes
----------------------------------------------------------------------------
Time For Parse:    0 hours  0 minutes   1.0 seconds (1 seconds)
Time For Trace:    0 hours 35 minutes  42.0 seconds (2142 seconds)
    Total Time:    0 hours 35 minutes  43.0 seconds (2143 seconds)
POV-Ray finished

I haven't checked out your car construction methods but the very low
hit-rates on boxes, spheres & superellipsoids suggests that the
internal bounding can be much tighter with serious reduction of render
time as a result. The license plates seems to be very expensive as
well. 

Experimenting with switching objects off leads to the conclusion that
your wheels are bounded poorly as the rest of the objects render
faster than the wheels alone!

/Erkki

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