[Bf-committers] Does Cycles waste half it's possible performance or am i wrong?

[Tobias Oelgarte]

Hi,

I guess i will have to do this to convince you. But it should be obvious 
that the error of the sum of two samples divided by two is better then 
to have only one sample and it's error, especially when the second 
sample is nearly for free. If you take a look at the filtering of 
Mitsuba then you will see that it are four samples at a time which 
influence one pixel. In average (as you pointed out "0.9 vs 0.1") is the 
same as having 2 full samples for a pixel.

Tobias

Am 28.10.2012 18:32, schrieb Brecht Van Lommel:
> Hi,
>
> I'm not going to spend more time on this discussion. The paper I
> linked to shows that the situation can be reversed even in some
> scenes, and I don't think your reasoning is correct. I understand that
> it would lead to less noise in other cases to implement the filter
> differently, and I agree it would be useful to do this once, but I
> don't think it's anywhere near the noise reduction you are suggesting
> in common cases. If you want to convince me of that I'd need to see
> some actual render results to demonstrate this.
>
> Brecht.