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Forum: Processes Involving Optical Photons
Re: Question Min step size for optical photons? (Pawel)
Date: 07 May, 2013
From: Gumplinger Peter <Gumplinger Peter>

Hello Pawel,

> I'm wondering whether there is a way to set the minimum step size
> for produced photons to make tracking less accurate, but also less CPU
> consuming? I've searched forum, but found only examples of setting
> maximum step size, which is not the case. If such a possibility exists,
> I'd be grateful for every hint.

The steps optical photons take during the simulation are already the minimum step size they can take. Optical photon steps are only limited by geometry and discrete processes. The geometry has to be interrogated to find the next volume boundary - I am not aware of any way to make this 'less accurate' but faster.

If you find the CPU consum prohibitive you may bias the number of optical photons you track. For example, you can remove every other photon in your UserStackingAction. This reduces the statistical accuracy but you may still get a result that is statistical significant for your setup.

Best regards, Peter

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1 Ok: Re: Min step size for optical photons?   (Pawel - 08 May, 2013)
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