Doesn't look like a radiosity error. Looks more like the kind of error you get
with ray-intersection problems, e.g. coincedent surfaces or innaccuracies in
isosurfaces/blobs, etc. Can you render a higher resolution close-up?

-- 
Tek
www.evilsuperbrain.com

"Bill Hails" <bil### [at] europeyahoo-inccom> wrote in message
news:4078fc07@news.povray.org...
> Anyone got any ideas what might be causing the unpleasant
> black speckling on the stonework?
>
> It seems to be keyed to the texture but only occurs with
> radiosity turned on and conventional lighting off.
>
>         radiosity {
>             Rad_Settings(Radiosity_OutdoorLQ, true, false)
>             recursion_limit 2
>         }
>
> rendered without aa.
>
> -- 
> Bill Hails

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