> Hi,
> images with mosaic preview that use radiosity render about 30% slower - is
> this supposed to work that way ?

Yes, radiosity uses mosaic for prescanning. (i don't know all the technical
jargon).
Try turning of mosaic and adding:

radiosity{
  pretrace_start 0.08
  pretrace_end   0.01
}

in the global_settings block, you will still get a mosaic preview.
pretrace_start and pretrace_end determine the start and end of the mosaic
preview used by radiosity.

I hope this is what you were asking and I haven't misunderstood.

-tgq

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