CAD-Andi napsal(a):
> Hi!
> 
> I'm experimenting with POVRay to simulate a simple physics-lab setup involving
> the following:
> 
> A spot light
> A Mirror Surface (does not need to be visible, just must perfectly reflect the
> light.)
> Some shadow generating objects before and after the mirror (invisible to the
> camera too)
> A semi-transparent Screen that catches and displays the reflected photons.
> 
> I've accomplished this task already by using "double_illuminate" for the
> screen., but I'm struggling with optimizing the render time.
> I understand that photons take their time to be calculated. But for a simple
> setup like
> this I hope I can keep the render time under halve a minute for a 600x800 image.
> Can someone give me some hands on tipps about best global settings and about how
> useful
> commands like "autostop" and other options like "adc_bailout" could be?
> Maybe with a little example script, optimized for fast calculation, showing a
> sharp and crisp projection of light reflected by a rectangular mirror against a
> screen. I don't need fancy blending and anti-alias. Speed is what I seek :-) ...
> Thanks in advance!!
> 
> PS: I think POVRay is the cooles thing since melted cheese!
> 
> Andi
> 
> 
the 'autostop' doesn't help much since the mirror is equal to its own 
bounding box
I guess the photons only take one bounce - off the mirror - so the never 
bailout, either
try reducing the photon count or increasing the spacing (whichever you use)
save_file the photons if you can

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