Burki nous apporta ses lumieres en ce 2005-06-21 17:06:
> JYR <jyr### [at] hotmailcom> wrote:
> 
> 
>>Note: POV-Ray cannot sample media along an infinitely long ray.
> 
> 
> I'd simply forgotton this not so unimportant fact ...
> 
> 
> 
> Alain <ele### [at] netscapenet> wrote:
> 
> 
>>There are to few samples for your situation.
> 
> 
> Yes ! Now it begins to work. I also increased the intervals in the test
> scene. In the original scene the beams looked a bit like a string of beads.
> Increasing the intervals from 10 to 30 helped to produce a more constant
> beam. But this also demands a greater rendering time.
> 
> Originally I wanted that a spot should shine out of every window. As I made
> 7x49 windows in total I think I'm going to drop this idea ...
Have a parallel light_source some distence away. Using a single light can help reduce
your render 
time. Be sure that it's far enough so that anything suposed to cast a shadow is closer
than the 
location of your light.
> 
> You helped me a lot, especially in encouraging me to read more in the help
> files   :)
> 
> Thanks,
> Bu.
> 
> 
Using method 3, it's beter to increase samples than intervels. Less chance to get
artefacts and 
normaly faster.
My tests using your sample scene: (render times)
intervals 25 in 14' 31"
samples 25 in 2' 46" still some artefacts
samples 50 in 5' 04" no notable artefact, smooth, at least as good as 25 intervals
samples 75 in 6' 59" very, very smooth, probably overkill
samples 100 in 8' 57" no notable improvement, overkill

Alain

Post a reply to this message