"Tim Nikias v2.0" wrote:
> 
> But with low_error_factor, it lowers the error_bound
> during the pretrace. In effect, when using low_error_factor
> 0.125 with error_bound 0.8, it should be doing the same
> as using error_bound 0.1 in the first place. The only
> difference is that it will interpolate amongst more samples
> in the final trace, as a higher error_bound has a larger
> gathering radius for the samples.

Well if you still can't find the reason for the differences i suggest you
take a look at the sample counts in the statistics of both versions.  

BTW you of course have to use 'always_sample off' in the render with
'low_error_factor' as well to get comparable results.

Christoph

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