"Richard Morehouse" <rmo### [at] coxnet> wrote in message
news:54iumusjjrl7c270bdaa9lb5flqa4jfqun@4ax.com...

> there are some artifact's in the windows that i don't understand. they
> appear as either black spots or places where the window frame is
> missing.  I have max_trace_level set to 10 but this didn't appear to
> change anything.  any comments?

I can't see the black spots (although, given you seem to have ruled out a
max_trace problem, they sound like they might be a co-incident surface problem).

The gaps look as though the line is too thin - try rendering a small area where
the problem shows up at a higher resolution and see if the lines re-appear.

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