StephenPope nous apporta ses lumieres en ce 2007/11/04 10:10:
> Hello all,
> 
> I'm a relative newbie here (but an experienced programmer and
> composer). I've been using POVray for a while, and now have some
> animations that are taking 2-3 days per frame (for an example of a
> simple frame, see http://HeavenEverywhere.com/Sc1gNew.png; the
> project file is in http://HeavenEverywhere.com/Sc1g2.pov and
> requires the MegaPOV include files in your .ini).
> 
> The scenes use multiple moving light sources, and various lenses and
> bodies of simulated water with reflection and refraction. To really
> slow things down, I also want the lenses to be out of focus using
> aperture effects (which are turned off in thye example frame above).
> 
> My question is, are there faster ray-tracers that run on simple
> networks (like 3-6 InteliMacs in a lab)? (Parallel POVray is still M$-
> Windoze-only.) I've looked into Tachyon, but its scene description
> language looks really primitive compared to POVray, and I'm uncertain
> as to whether it's still being developed. I've also found Radiance, Lux
> and MPV, but can't determine which scales best.
> 
> So many of the web references I find are really stale.
> Where is this discussion taking place?
> Are there other sites or lists for up-to-date info?
> 
> ......any reply appreciated...
> 
> Stephen Pope
> UCSB
> 
> 
Some things that may help make it render faster, some can alter the aspect.

For the plates, merge all differenced sylinders together, it gives you less 
overlaping bounding boxes: Now you have 31 overlaping bounding boxes for each 
plates, this can reduce the number to only 2.
(This will change the aspect of the holes) Bind the cylinders in a blob, set the 
treshold to a small value like 0.01 or a little smaler to minimise the rounding 
of the edges between the cyinder components. Blob's bounding may be advantagous 
in this case.

You can try to increase the value for adc_bailout. The default is 1/256, you can 
try 1/100. It will have some effect, principaly in the darker areas where you 
may stop before going trough all surfaces.

-- 
Alain
-------------------------------------------------
You know you've been raytracing too long when you know how to render a truly 
photorealistic compact disc, and you're not going to tell anyone
(least of all a POV user  ;)  ).
     -- Alex McLeod a.k.a. Giant Robot Messiah

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