On Mon, 25 Nov 2002 21:20:35 EST, "Rohan Bernett" <rox### [at] yahoocom>
wrote:

>I've just tried a couple of the suggestions and the scene is a bit brighter,
>but still a bit too dark. I'd say it still needs to be about 10% brighter
>(judging from some fiddling with the image in Paint Shop Pro). Unfortunatly
>the scene is still very blotchy even with these settings:

>  radiosity {
>    pretrace_start 0.08
>    pretrace_end   0.4

Why in the world are you using a pretrace_end larger than your
pretrace_start?! How is POV supposed to reduce the step size in this
case? Anyway, I would use pretrace_start 1 pretrace_end 1/512 if I
were really desperate

>    count 1600

Unless you're doing something extremely complex or extremely wrong,
this is definitely overkill!

>    nearest_count 2

Personally, I never go below 10. And that's the maximum. Of course,
your mileage may vary, but expect blotchiness with such a low setting.

>    error_bound 0.9
>    low_error_factor 0.5

That's quite high if you really have a lack of samples problem. I'd
use 0.5 for the pretraces and 0.3 for the final pass.

>    recursion_limit 20

Again, overkill. Unless you're doing something completely wrong,
you're just wasting your computer's time.

>    max_sample pow(10,30)
>    adc_bailout 0.01/pow(10,3)

That's just slowing things down. Use a max_sample equal to the
brightness of your object. If you really are using an ambient of a
decillion, you're definitely on the wrong track, and of course you're
going to run into precision problems.

>    //always_sample off

Maybe leave it on, as it seems you have a lot of time on your hands :)


Peter Popov ICQ : 15002700
Personal e-mail : pet### [at] vipbg
TAG      e-mail : pet### [at] tagpovrayorg

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