"Fabien Mosen" <fab### [at] skynetbe> wrote in message
news:3C1### [at] skynetbe...
> Too bad it isn't possible to turn reflection off for
> radiosity samples.  Commercial packages does that,
> and thus gain much speed without noticeable difference.

http://www.students.tut.fi/~leppane6/pics/sibenik_25m.jpg
http://www.students.tut.fi/~leppane6/pics/sibenik_20m.jpg

These aren't good looking, just testing this trick.
The first is a one trace image (25min ??s). The second is traced in to
steps. First commented out reflections and added save_file to the radiosity
block. After the trace (19min 27s) reflections were uncommented and in the
radiosity block save_file was replaced with load_file, pretrace_start and
pretrace_end were set to 1 and added always_sample off. This trace took 1min
16s, total time 20min 43s.
They look quite the same and later saved about 4 minutes. Looks like that in
the 20 minute version the red bleeds more.

Ari-Matti

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