Am 30.09.2012 21:41, schrieb Asfar:
> Hi,
> i'm rendering large images, the last ones with pov-ray 3.62.
>
> now i switched to v3.7 rc5 and then rc6, and i ran into a big problem:
>
> for many images it takes several hours to just pre-trace the radiosity,
> and since i just can use my computer for about 12 hours, i got used to
> continue_trace in v3.62, which worked just fine.
> when the pre-trace was done and the final rendering was in progress, it could be
> interrupted and continued the next day where i left.
>
> but in v3.7 rc5 and rc6 povray is redoing the pre-trace everytime restarted,
> even with radiosity_from_file=on and ..._to_file=on.
>
> since i wanted to work with sslt, it has to be v3.7, but the pre_trace of my
> actual image takes 11 hours, and i really don't want to do that again and again.
> is there no way pov-ray v3.7 will re-use the already calculated values and just
> continue_trace ?
> or am i missing something ?

POV-Ray will always try to satisfy the various radiosity quality 
requirements, even if it loads radiosity samples from a file. That 
means, if your first run did not produce anywhere near enough samples 
according to the quality criteria (because pretrace_start and 
pretrace_end would result in too few pretrace passes), POV-Ray will do 
another pretrace to compute more samples.

One solution should be to set both pretrace_start and pretrace_end to 1 
in the subsequent renders, giving you virtually no pretrace at all.

Post a reply to this message