Alain <aze### [at] qwertyorg> wrote:

> I've found another black spot in the trees...
> Do you use transparency? If so, try increasing max_trace_level around 100.
>
> Do your tests without focal blur. Faster and will show if it's related
> to foral blur.
>
> Also, do a test without radiosity to verify if it's radiosity related or
> not.
>
>
>
> Alain

Hi Alain,

OK, the no focal-blur and no radiosity images did not have black spots so it
seems like a combination of the two.

I do have transparency and reflection in the scene but am not sure about the
max_trace_level as I thought there is normally a warning output during tracing
if max_trace_level has been reached and I did not see any warnings.

However, I have increased the max_trace_level to 100 and have re-calculated
radiosity data with some improved settings, the no AA trace looked like it was
black in several areas but due to lack of AA it is difficult to tell for sure. I
am re-running a trace with loaded data and AA 0.01 to see if I get any black
spots.

I am starting to suspect this may be a memory problem (not limit but physical)
as my PC seems to be periodically hanging during traces. I think some more tests
are in order..

Sean

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