"Physiker" <nomail@nomail> wrote:
> > Nicolas Alvarez <nic### [at] gmailcom> wrote:
> ....
> > How about radiosity? The pretrace looks like mosaic preview, too.
>
> Yes, thank you, you are right: It's radiosity in my scene. :-)
>
> So radiosity mosaic preview is new in beta31?!

First off, let's stick to the term "radiosity pretrace", as its intention is not
to give you a preview, but to collect radiosity data before the main render.

No, the radiosity pretrace is nothing new. It can be seen just as obvious in
3.6.1c, for instance.

With the SMP extensions, however, the pretrace was no longer that obvious until
(and including) beta.30, as it would be done in the same "SMP pass" as the main
render, i.e. POV would "first" do both the pretrace and main render for the
first SMP cell, "then" the pretrace and main render for the second SMP cell,
and so forth (of course, "first" and "then" to be understood in the SMP
context).

With beta.30-rad1 the concept was changed to do an individual "SMP pass" for
each pretrace pass, i.e. POV will now first do the 1st pretrace for all SMP
cells, then the 2nd pretrace for all SMP cells, and so forth, and finally the
main render ("first", "then" and "finally" in this case denoting real time
relationship).

So in some sense - yes, the fact that radiosity pretrace double-features as a
kind of mosaic preview was (re-) introduced with beta31 (or, to be more
precise, with beta30-rad1).

It has always been there in this double role in POV 3.6 though.

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